Silky's is a stand-by if you live in squirrel hill. it has a pretty laid back atmosphere and is usually lively even during the week, which makes it great for meeting up after work for a few beers (wednesday is import night!). plenty of room upstairs with tables and free wifi is you want to at least pretend to get some work done.
but by far the best thing about sikly's is their mini-shuffleboard table, which is way more fun than you would ever expect if you haven't tried it before (usual rule: losing team buys the next pitcher).