Unfortunately, most so-called "sound guys", particularly at rock or country events, but also jazz and even classical, have absolutely no clue what they are doing, especially if the music in question is electronically produced. Most of it is ridiculously over-miked and then mixed terribly, and played at ear-splitting volumes, so that it has absolutely no resemblance to what any self-respecting audiophile would call good sound. As blindjim says, many people, especially young people, now think that this is what music is supposed to sound like. I don't want to get started on this, I have ranted about that here before.
That said, however, it is also true that your home audio system should never be your reference point. Though it may sound better than the crap you hear at many live events, it will never capture the magic of live unamplified acoustic instruments in a really good space such as a great concert hall or jazz club. You will hear and enjoy so much more of the music than you can on your home system, I don't care how good it is.
I can ask a colleague from Pittsburgh if there are any good jazz clubs (sound-wise, I mean), if you want, but in the meantime, if you are at all a fan of classical music, you have one of the finest orchestras in the country right now in the Pittsburgh Symphony. I urge you to go check them out. I haven't heard their hall, so I can't comment on its acoustics, but I could ask my colleague about that as well.
