Beer Bistro is a few steps away from my office, and has become a regular spot for business lunches. The beer selection is great and the food is good. They even have dogfish head on the menu! You can just about find any obscure brew here, and I'd say the overall selection is on par with Bier Markt, although some of the offerings are from the bottle.
Food wise, be sure to get an order of the belgian frites that are deep fried in duck fat - delicious. I typically order mussels here and they have a long list of different flavours. You'll get sourdough bread on the side. A note that any of them that include bacon I found to be quite salty (it'll just make you drink more!). The sandwiches are also very good, but they only come with a small portion of coleslaw, which makes the belgian frites that much more necessary!
It's a small restaurant with a decent sized patio and a bar in the back that allows you to sit in front of the kitchen, which is neat. They also play classic beer commercials in the washroom. The only thing I found is that the decor could use a bit of updating (for some reason I remember the pattern on the chairs). Anyone looking for a more intimate restaurant that has a great beer selection - this would be it!