"When did all the college students become alcoholics?"
That's what the nice lady at the Green Line stop asked me as we stepped onto the incoming B Line train on Saturday night, after what seemed like a half hour wait, during which time a parade of inebriated BC and BU students had tottered past us like some impromptu zombie march. But I think we'd really bonded when a cab had pulled up next to the stop, and a drunken (if cute) young lout - who was crammed in the ba…