If you love hanging out in the Roosevelt District, then you will love the Lost Leaf.
It's tucked away on 5th St just south of Roosevelt in a historic old house. They've torn out the ceiling and left exposed brick in places, giving it an amazingly open atmosphere despite the small space.
The beer selection is incredible, although there are no beers on tap. There's nearly always live music; I prefer the jazz groups over the louder sets since the building is so small.
I heard a rumor that they are trying to expand the patio area and add draft beer - that would make it perfect!