I was born just outside Boston and moved to SF when I was a number of years ago, but I try to keep up with the Boston Hip Hop scene. The major venue I always hear about is the Middle East. Don't know if that helps, but I know they got stuff going on. I know the UGHH.com actual store is out there somewhere and every once in a while they got something there. I would imagine if you stopped through there they might know about something or have some flyers, but I've never been there so I don't know for sure