Well, Pittsburgh has had dedicated busways since the 70s, arguably they had the first "BRT" in the states. Sadly, they seem to be facing the same kind of deficit troubles the MBTA is, so their buses might be brutally cut by the fall.
Unfortunately, downtown Pittsburgh is dead after 5:30pm, everyone flees to their neighborhoods. However, many of the neighborhoods are quite nice, and I think a Bostonian would find themselves at home in some. I lived in Shadyside for awhile, which has nice, relatively small streets and many old multifamily homes, so decent density.