B+
Everything Is 21+
Unless you feel like going to the movies every night, if you're not 21 you're probably not going anywhere. Bars, clubs, some pubs, and even bowling alleys have a very strict 21+ policy. Don't get caught with a fake ID anywhere near campus, it will come back to school authorities. Also, be very careful when attending parties if you're under 21, or if you're hosting a party for underaged students. If your party gets busted, you can get in serious trouble with the school. Select comedy clubs are 18+, I've always found them to be a fun and inexpensive Boston outing.
If you are 21+, the nightlife is great. There's a bar at every street corner, and you can be sure to catch a Red Sox, Celtics, Patriots, or Bruins game in any 1 of them. The best bars and clubs are by Fenway park, State Street, and the theater district. The best house parties are right off campus, and at BU and MIT.