Lol, oh god, I can empathize with that too well. If it helps you can use Apollo, he'd probably fit in with the concert scene than any of my other character, though I don't have a whole lot of resources outside of my comic.
He's supposed to be a strawberry blonde, with freckles, and he's also got ocular albinism so his eyes are sort of a purple-red (I kind of get carried away with my shading...). 6" or about 182cm, has a little muscle definition. -inserts more mary-sue bologna-
He's more of a skinny jeans and tanks/loose shirts type of guy, but if you use him feel free to dress him in whatever. Good luck with your crowd search!
Also sorry if I sound anal, I don't have a problem with how people draw my character really, it just OCD so it usually helps me to know the details when I draw stuff. Soo yeah, sorry if this post comes off more obnoxious than helpful. <_<