It took me all of high school to realize that a lot of the band girls were totally hot. I wish I had figured it out sooner. I've been a musician most of my life, but I never joined the high school band. In hindsight, I totally would have. I ended up dating one of the drum majors for a while and it was awesome :)
OK, so I think the uniforms usually look boyish and/or asexual. But that's a minor complaint. Band nerds rule.
Lol don't even worry about it! I too was a band nerd and the guys dig it as long as it looks like YOU'RE having the time of your life. Seriously, your hobbies aren't a big deal as long as you're having a good time doing it. Now, on the other hand, if you're standing around looking all awkward in your uniform, THAT can be a turn off. Just don't worry about it. Have fun and guys will see that smile and like you in or out of uniform. xD