I'm going to run counter, and say that maybe it is a good first date idea as long as you frame it as not being a date and she's interested. Friends go to see concerts together all the time, and part of that is going to see a concert of music that one is not the least bit interested just to experience it. There will be a lot of people there, and there would be plenty to talk about without having to focus on either of you. That being said, you should use the opportunity to talk about music in general rather than just standing there and ignoring her. Even if she likes that kind of music, being ignored kills any chance at making a connection with you.
Besides, if she's not interested, you can just fall back on coffee sometime.