TT the Bears, Boston
Went to TT the Bears a few times during my time in Boston. I rather liked it. Nice size and decorated with fairy lights (although someone told me, they' weren't sure if they were still there these days).
Tucked down a side street in Central Square, T.T.'s has provided a venue for small musical acts of all genres. Apparently Nirvana played to only 13 people there once. The crowd ranges from band supporters to musicians to local students.
They also have a couple of pool tables and a few corners where you can hang out and chat (nice touch)
Dress Code: Jeans & a T Shirt will be fine.