I used to be a regular at Harris Grill until I moved a bit further away, but I still try to return for the I Can Haz Bacon Cheesburger and Bacon night. Where else can you go on a Tuesday and order a side of bacon with your meal?
While Harris isn't the only place in Pittsburgh where you can get your drinks delivered to you by a cute hipster waitstaff, it certainly has one of the widest & best beer selections in the city. I've also heard tell that the frozen cosmos are quite good.