Affinity Group
An informal, voluntary group of employees who share a common identity, background, or interest and meet regularly for mutual support, networking, and community building within the workplace.
- What Is an Affinity Group?
- Affinity Group vs Employee Resource Group (ERG)
- Types of Workplace Affinity Groups
- Benefits of Affinity Groups for Employees and Organizations
- How to Start an Affinity Group
- Best Practices for Sustaining Affinity Groups
- When and How to Evolve an Affinity Group into an ERG
- Frequently Asked Questions About Affinity Groups
What Is an Affinity Group?
Key Takeaways
- ✓An affinity group is an informal, voluntary gathering of employees who share a common identity characteristic, life experience, or personal interest.
- ✓Unlike ERGs, affinity groups typically operate without a formal charter, executive sponsorship, or dedicated budget. They're grassroots by nature.
- ✓Affinity groups trace their workplace origins to the 1960s civil rights movement, when Black employees at companies like Xerox began meeting to discuss shared experiences.
- ✓78% of large employers now support some form of identity-based employee group, whether formally structured or informal (SHRM, 2023).
- ✓Affinity groups are the most common first step toward building an ERG program. Many companies start with informal groups and formalize them over time.
An affinity group is a gathering of employees who share something in common and choose to connect around that shared experience. It might be race, gender, religion, sexual orientation, disability status, military service, parenting, or even a shared hobby. The group meets regularly, usually monthly, to talk, support each other, and build relationships. There's no formal reporting structure. No business objectives document. No quarterly metrics review. That's what makes an affinity group different from an Employee Resource Group. An ERG has corporate infrastructure behind it. An affinity group is organic. Five working parents start having lunch together every Thursday. Ten LGBTQ+ employees create a private Slack channel. Eight veterans begin meeting in a conference room on the first Friday of each month. That's an affinity group. These groups exist because representation matters and isolation is real. Being the only woman on an engineering team, the only Black employee in a department, or the only person managing a disability can feel lonely. Affinity groups say: you aren't alone here. Someone else understands your experience. That simple act of connection can be the difference between an employee who stays and one who leaves.
Affinity Group vs Employee Resource Group (ERG)
These terms get used interchangeably, but they describe different levels of organizational maturity and structure.
| Dimension | Affinity Group | Employee Resource Group (ERG) |
|---|---|---|
| Structure | Informal, no charter required | Formal charter with defined mission, goals, and governance |
| Leadership | Volunteer organizer(s), no formal roles | Elected or appointed leadership team with defined roles |
| Executive sponsorship | Rarely has one | Executive sponsor required (VP level or above) |
| Budget | Little to none; relies on informal support | Dedicated annual budget ($5,000-$50,000 typical) |
| Business alignment | Social and support focused | Tied to business strategy, DE&I goals, and talent objectives |
| Membership | Typically identity-specific | Open to all (identity members plus allies) |
| Reporting | No formal metrics | Tracks membership, events, business impact, and retention data |
| Company recognition | May or may not be officially acknowledged | Formally recognized and supported by the organization |
Types of Workplace Affinity Groups
Affinity groups form around any shared dimension that matters to employees. Here are the most common categories.
Identity-based groups
Formed around race, ethnicity, gender, sexual orientation, gender identity, disability, religion, or nationality. Examples: Latinx Employees, Women in Engineering, LGBTQ+ Community, Muslim Employees, Deaf and Hard of Hearing Network. These are the oldest type of affinity group and remain the most common. They provide a safe space to discuss experiences that members may not feel comfortable raising in mixed settings.
Life-stage groups
Organized around shared life circumstances: working parents, new hires, employees nearing retirement, caregivers for aging parents, employees going through fertility treatments, or recently relocated employees. These groups provide practical support and resource sharing. A working parents group might share childcare recommendations, while a new hire group helps recent joiners build their internal network faster.
Interest-based groups
Built around shared hobbies or passions: running clubs, book clubs, gaming groups, sustainability advocates, or volunteer teams. While they aren't diversity-focused, they serve a similar community-building function. Interest-based groups often have the broadest membership because they cross all identity lines. The sustainability group might include people from every department who would never otherwise interact.
Benefits of Affinity Groups for Employees and Organizations
Affinity groups create value at the individual, team, and organizational level, even without a formal business mandate.
- Reduce isolation for underrepresented employees who may be the only person with their identity in their immediate team.
- Build cross-functional relationships that break down departmental silos. Members meet people from other teams they'd never encounter in their daily work.
- Provide informal mentoring and career advice from people who've faced similar challenges and can offer specific, relevant guidance.
- Increase retention by creating emotional connection to the company beyond the job itself. Deloitte found that 46% of affinity group members report a stronger sense of belonging.
- Serve as an early warning system for cultural issues. If an affinity group's members are consistently raising the same concern, it signals a broader problem.
- Create a pipeline for ERG formation. Companies can identify which affinity groups have enough energy and membership to evolve into formally supported ERGs.
How to Start an Affinity Group
Affinity groups don't need approval committees or project plans. They need a few interested people and a time to meet.
Find your people
Start with 3 to 5 colleagues who share the affinity. Send a casual message: "I'm thinking of starting an informal group for [identity/interest]. Interested?" Use company communication channels (Slack, Teams, email) to gauge broader interest. You don't need 50 people. A group of 6 that meets consistently is more valuable than a list of 40 people who never show up.
Pick a meeting format
Keep it simple. A monthly lunch, a bi-weekly coffee chat, or a standing 30-minute virtual call. The format should feel easy, not like another meeting. Some groups rotate between structured topics (a speaker, a discussion prompt) and unstructured social time. Remote and hybrid groups work well with virtual coffee chats or a dedicated Slack channel for async conversation.
Communicate with HR
Let HR know the group exists, even if you don't need formal approval. This creates visibility, may unlock small perks (a reserved conference room, a pizza budget), and puts the group on HR's radar for future ERG development. Most HR teams are glad to see organic community building and will offer informal support.
Best Practices for Sustaining Affinity Groups
Starting an affinity group is easy. Keeping it alive for more than six months takes intention.
- Establish a regular meeting cadence and stick to it. Monthly is the most sustainable rhythm. Canceling meetings erodes commitment.
- Rotate facilitation so the group doesn't depend on one person. If the founder leaves the company, the group should continue.
- Mix formats: one month have a guest speaker, next month do a roundtable discussion, the month after try an off-site social activity.
- Keep membership open but don't pressure people to join. Forced participation undermines the voluntary nature that makes these groups work.
- Document what you do, even informally. A shared doc listing past topics, resources, and decisions helps new members catch up and shows the group's value over time.
- Connect with other affinity groups for joint events. A Women in Tech group and a Latinx Employees group co-hosting a panel creates intersectional conversations and expands both networks.
When and How to Evolve an Affinity Group into an ERG
Not every affinity group needs to become an ERG. But when the signs are right, formalizing the group unlocks resources and organizational impact.
Signs your group is ready
Consistent attendance of 15 or more members for 6 or more months. Members asking for more structured programming. The group generating ideas that affect company policy, hiring, or products. Interest from senior leaders in supporting the group. When you see these signals, the group has outgrown its informal structure and would benefit from a charter, budget, and executive sponsorship.
Steps to formalize
Write a charter defining the group's mission, membership, leadership structure, and annual goals. Identify an executive sponsor at the VP level or above. Submit a budget request to HR or the DE&I team. Establish leadership roles with defined terms. Set measurable objectives for the first year. Continue everything that made the informal group successful: the community, the candor, the low-pressure atmosphere. Formalization should add resources, not bureaucracy.
Frequently Asked Questions
Are affinity groups the same as cliques?
Should the company fund affinity groups?
Can affinity groups create division in the workplace?
How is an affinity group different from a team or committee?
Do affinity groups work in small companies?
Written by Adithyan RK