I agree w/ Aphigal, sort of.
You're at the party to talk to the members, so try to go while you're in between parties. We can't go during the party unless it's an emergency, try to follow that too.
But mainly I wouldn't want a rushee going to the bathroom during a party because it'll probably be thrashed. Rushees--think about how you're bathroom looked before you ran out to meet your PX group. Now multiply that by 100! Every member of that house was in the bathrooms doing hair, make-up, etc. right before the parties started. Not a pretty site at all.
