With what I said above out of the way.
I have a few ideals when it comes to first music:
1) what I said above
2) they must play: YMCA, Maraina, The Chicken dance, The electric slide, and Kryptonite (well maybe the last one is asking a bit much
)
3) It shouldn't be so loud that you can't hear the person next to you. This becomes annoying when you are trying to scout and coordinate spirit in the stands.