One of my all time favorite places to go in Pittsburgh, both as a bar and as a place for dinner. If you are a fan of cocktails, this is where you need to be hanging out. They are associated with the local chapter of LUPEC (http://www.lupec.org/) and therefore have some just wonderful cocktail suggestions. I often like to try something different, though have found a few favorites there as well to just be amazing.
Their food warrants note as well, in particular the item I go there fore the most - their macaroni and cheese. It is, without a doubt, some of the best mac and cheese I've ever had in my life. It comes out in a bowl molten hot, the top of it just perfectly burnt. Biting into it right away is somewhat foolish, yet I can never resist. Must try.