convocation

company, consort, coterie, gang, pack

caucus, forum, market, panel, rally, symposium, synod

audience, gallery, grandstand, house

crowd, flock, horde, legion, multitude, press, swarm, throng

crush, mob, rabble

clinic, workshop

caucus, conclave, synod

demonstration, rally

conversation, dialogue (also dialog), discourse, discussion, palaver, talk

negotiation, parley, summit

conference, forum, roundtable, seminar, symposium

audience, interview, session