You can call a group of performers a troupe. The kids you dance with are your dance troupe, and the jugglers and clowns at your friend's party might be a circus troupe.
If you love performing improvisational comedy, you may want to join a local improv troupe, and if you like the idea of caroling at Christmas time, you can form a troupe of singers to sing carols with in December. Troupe is a French word meaning "company of performers," which earlier meant "company of soldiers." It shares a root with troop.