Live Bluegrass and fine Bourbon? *Raises Hand*
I really like Thunderbirds, a lot. It's not the best bar in the 'Burgh, but it definitely has a niche and does well with it. I really enjoy the bands this place attracts and I feel they do a good job presenting them. Sitting on their balcony during a show is a load of fun because the sound is good, but you can still have a strained conversation and have fun with your pals.
Thunderbird also have a good variety of craft beers and I think they're average priced. BUT certain music just goes better with Bourbon and Thunderbird does have the good Kentucky swill.
So, I challenge you to find a place in Pittsburgh where you can sit back, drink Basil Hayden's, and listen to live Bluegrass or Irish Folk Rock.