affairs, bashes, binges, blasts, dos(or do's), events, fetes(or fêtes), functions, get-togethers, parties, powwows, receptions, shindigs

benefits, fund-raisersballs, dances, formals, promscelebrations, galas, occasionsbacchanalia, bacchanals, orgies, saturnaliasbakes, clambakes, cocktail parties, hen parties, house parties, housewarmings, icebreakers, kaffeeklatsches, keggers(also keg parties), klatches(also klatsches), masquerades, meet and greets, mixers, salons, showers, socials, soirees(or soirées), stags, suppers, symposia(or symposiums), tea parties, teas