Monterey Pub might be in the running for the best Irish bar in Pittsburgh. The service is incredible, the menu is diverse and the ambience is pretty good. I enjoyed a Guinness boxty the other day. It's basically a stack of potato pancakes with a variety of ingredients inside. Monterey's beats Piper's by a mile on this menu item. It is a bit salty but it's worth it. Everyone that works at Monterey excudes a feeling of a friendly neighbor you've known your entire life. They don't have a happy hour, no matter what the website says, but the daily specials are worth checking out for sure. Cheers!