Since this thread appears to have been revived a little bit, I'll throw in my two cents.
I'm fairly musically inclined. I have perfect pitch and I studied music quite seriously in high school and in college. I love live music of all kinds. I couldn't tell you how many chamber, symphony, and opera performances I've been to over the years, though in the past couple of years since I stopped playing I've seen hardly any at all. I think classical concerts might be ideal for Aspies, since they are much more relaxed, the seats are comfortable, and there's generally a pretty specific set of expectations as to how audience members behave.
Since I live in the general vicinity of Nashville, I've also made it to quite a few non-classical concerts, but always in smaller auditoriums, or (my favorites) in the little venues that only hold a few hundred people (of which there are a lot). Of course, there's lots of different kinds of music that I attend; a Toubab Krewe show is generally more lively than, say, Joanna Newsom. It is a little nerve-wracking sometimes with all those noisy and often pushy people standing around you, and I do use alcohol--not much, just a couple of PBRs usually--to help me feel more relaxed.
One thing I tried recently that really surprised me was attend a large (80,000 people large) music festival. In the week leading up to it I started to have serious doubts as to whether I could handle it, but surprisingly, I had one of the best times of my life. The music was great and I was camping with good people. However, I don't think I could have gotten through it without smoking as much pot as I did (typically starting first thing in the morning, with little windows of higher sobriety). But thanks to the fact that I was with a group of friendly and more-experienced neurotypicals (wonderful ones, in fact...they're not all bad!), I was able to feel safe and relatively relaxed, enough so to even try shrooms a couple of times without feeling in danger (and yes, they were wonderful trips; please don't judge me).
In short, yes, I love live music, but I would never, ever go to any of these venues on my own. As long as I have at least one trusted friend with me, though, and perhaps a beer or two, I tend to have a wonderful time.