Quorum

Noun

 * 1) The minimum number of members required for a group to officially conduct business and to cast votes, often but not necessarily a majority or supermajority.
 * We can discuss the issue tonight, but cannot vote until we have a quorum.
 * 1) A selected body of persons.

Derived terms

 * disappearing quorum
 * inquorate
 * quorate
 * quorum-busting

Thesaurus
assemblee, assembly, assignation, at home, ball, brawl, caucus, colloquium, commission, committee, conclave, concourse, congregation, congress, conventicle, convention, convocation, council, dance, date, diet, eisteddfod, festivity, fete, forgathering, forum, gathering, get-together, housewarming, levee, meet, meeting, panel, party, plenum, prom, rally, reception, rendezvous, seance, session, shindig, sit-in, sitting, soiree, symposium, synod, turnout