A new twist on an old favorite. This is very similar to a key party, but usually held at colleges or during high school where the couples are not all able to drive to their residence to consumate the evening.
When the time has come to pair off, the gals take off their panties and they are put into a bag. The men blindly select a pair with the girl's name pinned to them. This determine who he is going to have sex with.
My sister invited me to a panty party when I was a sophomore. It was so exciting not knowing who I was going to have sex with. I would have never have though of having sex with Barry before the party, but enjoyed it so much that we have been dating ever since. We've even been to a few more panty parties since.