Committees/groups here:
Staff team (all paid members of staff plus non-stipendiary with formal roles). Pcc. Wardens. Welcome team. Prayer ministry team, pastoral ministry team, prison ministry, hospital visitors, old people's homes ministry, children/youth ministry, mission contacts, life group coordinators, flowers, worship, AV desk, cleaning, older people, toddler group, schools visitors, street pastors, bible readers, lay ministers, Christmas Carol service team, passion play team, buildings committee, women's ministry, men's ministry, 18-30s...
That's all I can think of off the top of my head, but somewhere I have a multi page booklet listing all the different ways to get involved.