Boston has a very lively belly dance scene. You can see live performances every Wednesday-Sunday, with several performances to choose from on the weekends. There are also several workshops or dancer-organized shows per month.
To keep up on the latest events, I recommend that you join the following groups:
There are many venues in the greater Boston area that feature dancers. The quality varies a lot from venue to venue, and sometimes over time as well. My personal favorites are:
For a larger list of venues, check out the nebellydancecalendar group.