In that case, go for dim sum at Dragon Pearl on Tyler street in Chinatown.
For live music, I would recommend The Middle East in Central Square and Paradise Rock Club on Commonwealth Ave close to BU. Both are pretty small venues. For even a smaller venue, T.T's in Central square only holds about 100 people, but tends to get bands that make it big in a few years. After the show in Central square, you can walk up Mass Ave. to People's Republic for drinks and pictures of Lenin. When they close at 2 or so, keep going north on Mass Ave. and get yourself to Hong Kong in Harvard Square for late-nite Chinese snacks. If you make it there before 2 am, I think you can still get scorpion bowls.
If you like beer, Sunset Grill in Allston's good for wide variety. There's a small pool hall upstairs that acts as the extended waiting room for the restaurant.