Brewster's is a Canadian chain that does a pretty good job. In the downtown location, it's pretty much a sports bar with several large and small screen TVs on the walls. We watched a preseason Canandian football game, which was fun even though we didn't know the teams. Overall, clean, fun, and possibly a meat market for younger types at night.
With no veggie options except pizza and nachos, we opted for the Brewhouse Nachos, which were very good. Waitress was friendly and fairly fast, seemingly knew a bit about beer. No air conditioning, which probably isn't much of a problem in Calgary, but it was the day we were there. Very hot. On a cool evening, the fireplace inside the door would've felt better.
All the beers were well done and very respectable. The standard Canadian style Original Lager was crap, but it's supposed to be, just like a standard American ale/lager in an U.S. pub. But all of the other beers were very drinkable. Stand outs included the Flying Pig Lager that had a nice clean hop bite balanced w/ a bit of malt. An unexpected surprise. The Blueberry Wheat Ale was well done and my wife had a draft that came with real blueberries in the bottom. Unlike most fruit beers that taste like syrup poured down the center, this fruit taste was well integrated, which, in my experience, is difficult to do with blueberry. The Shaughnessy Stout was my favorite, an Irish Stout that was very smooth, a little thin, but very solid.