going out with ten people for my 21st birthday the week before christmas?
its not boston, but my nephew took 10 friends for his 21st to Providence, and stayed in a 3 room suite at a really great deal and ate at Dave and Busters and they had a fantastic time.. He also said breakfast was at the best diner he ever went to. If you are interested i can get you the hotel and diner names..
You also might like Bostonville Grille in Lynnfield on rte 1 north. They have a giant arcade, tons of giant TVs, texas holdem, trivia, pool etc.
325 Broadway, Lynnfield, MA 01940