I think these people are a bit rude and were terrible hosr/companion types. I don't think it was being alone that was really the problem, it was the people you were with. You had an expectation and they failed to even try to live up to it.

You talk a lot about going out to different venues for music. Check meetup to see if there is a music related meetup. In my area there are 2 music related groups. One for local places with live music and one for area concerts with bus transportation to larger venues. Someone I met in family game night meetup (think scrabble and pictionary at the library) mentioned it. It turned into a monthly gathering at a local restaurant and has been a lot of fun.