There's a place called "The Snuggery" in the food court. It's pub-ish and looks like a sports bar. I can't speak for their beer prices, though. There's also the Metro Deli near the Great Hall. Same thing... sort of pub-ish, not as sports-oriented, with lots of cool retro posters. They have free Wi-Fi and serve beer.
If you want burgers and stuff, Boston Blackies is just north of the station, along the west side of the river. If you're looking for pizza and beer, Beggar's Pizza is SW, near Clinton and Jackson. There's also a Giordano's right across the river on Jackson, but you'll want to call ahead if you want deep dish (it takes approx. 45 minutes to bake it). Bombacigno's is on Van Buren, between Clinton and Jefferson, a bit more southwest-ish than Beggar's. I've heard good things but haven't eaten there.