Alright, which top b-school student body has the worst sense of humor?
Probably some east coast school. My experience has been that east coast people in elite places are more snobbish than anything. West coasters, however, tend to be more eccentric if they are in a elite school and are therefore a little weirder and a more open sense of humor.
So, for top B-School I would say Haas or Stanford. Since those are the only two that really stand out. Though, Stanford attracts some yuppity undergrads they will be hot.