Feral Foster at 345 Jay St.
I am sure that I have put the Roots and Ruckus show (Wednesdays at Jalopy) on the recommended shows list a few times. One reason is this guy, "Feral" Matt Foster, who plays every time and is absolutely brilliant. It is one thing to have a voice which can fill a room but quite something else to actually sound good, to nail the quiet parts as well as the loud parts, and he can do it. Great stage presence too. Solo performers, catch him sometime you can watch and learn.