Comfy little Squirrel Hill coffee shop. I pretty much only order my usual decaf (black) but there is a nice selection of coffee drinks and sweets on the counter. My favorite aspect is the little outdoor patio with lights strung up above. It's the perfect place to spend a summer evening catching up with a friend.
Indoors it can get very crowded with students studying, and you'd be better off if your laptop had a strong battery because it can be difficult to get an outlet. Even with the crowd, though, it never gets very loud because most people have their noses in books and headphones in their ears.