As far as guitar stores, there's also backstage guitars in Lawrenceville, empire music in Mt. Lebanon, NStuff music in blawnox, and guitar centers in Monroeville and Robinson.

Sadly, the music scene in terms of venues has definitely retracted in recent years, in part due to the pandemic (or asshole neighbors for James Street). There doesn't seem to be a very well-connected or cohesive music scene of any sort here but there are some great artists/bands around.