A small group of people who are interested in the same thing and who usually do not not allow people to join the group
1) She joined her coterie of fellow musicians.
2) His films are admired by a small coterie of critics.
From Old French cotier which means 'cotter'.
body, bunch, clan, circle, clique, community, gang, coven, crowd, fold, galère, klatch/klatsch, lot, network, pack, ring, set