This is a pretty cool town. Lots to do, lots of places with good stuff on tap. We wound up in The Littlest Bar, which lives up to its billing and, as far as I can tell, is the only genuinely Irish bar in Boston.
Thanks to the folks who threw me suggestions. I'm going to continue avoiding the tourist traps and smell out Boston's best beers. In case you were wondering, Tremont IPA is certainly not it.