I haven't been there yet, but Portsmouth Book and Bar looks like it has great potential. I mean, I like books and I like bars, especially those with a great beer selection. They will also be hosting music events and the first one will be Session Americana on Wed, January 23, 2013 at 8pm. They'll pass the hat to pay the musicians.
More info at facebook.com/PortsmouthBookAndBar. Be sure to read their bio and you'll see why this is a place you should check out.
Here's a video of Session Americana and some friends that you may recognize. The video was shot at their home base, Lizard Lounge in Cambridge.
See my Music Calendar and Music Festivals for upcoming shows in New England