What do people who were really into themed parties in college do after they graduate? Probably go to Back Bay Social Club on Boylston, which seems to throw a different themed party every night. So if Harry Potter trivia or a Halloween tiki party seem like your kind of thing, you’ll find likeminded souls here. Otherwise, the menu is a pretty standard mix of bar food, pizza, and a few meaty entrees. Head here for Happy Hour, but plan something else for dinner.