The St. Clair has a lot going for it, but my favorite part has to be the drink specials. During my last trip, all draft beer was $3. That deal even included Christmas ales that were garnished with a rim of honey and cinnamon (soooo amazingly delicious). There seems to be some sort of drink special nearly every night.
Another plus? Keystone is right next door. That's right you can get mac and cheese AND a delicious beverage in one stop. They even share a bathroom, so you can walk from one to the other without even going outside (which is nice in the winter).
I love being able to relax there (and maybe even play a board game or two).