One interesting and often surprising bit of wordplay is the official name applied to various types of animals who assemble in groups.  We often hear of a herd of cows or a school of fish.  Then, there are the less familiar references like a raft of ducks, a gaze of racoons or an army of frogs. Does anyone have any suggestions as to what term would be ideal to describe groups of persons like : 
 
 A "bummer" of cancer patients. 
 
 A "bongload" of investment bankers. 
 
 A "series" of girlfriends.
 
 A "wad" of porno stars.
 
 A "whiff" of hippies.
 
 A "bullpen" of lesbians.
 
 A "stench" of Frenchmen.