What is Your Favorite Type of Costume Party? [POLL]

I haven't been to a Toga Party in about 9 years. The last one I went to was when I was right out of High School. For some reason a buddy of mine decided to have a Toga Party this weekend.

When I asked him why a Toga party, he replied "Because I figured every one has sheets and if they don't its a cheap way to have a costume party". I don't think my friend has ever had to buy sheets before. Sheets aren't cheap!

Either way, I will be participating in this attempt of an Animal House remake. Hopefully it doesn't get as crazy as the Toga party in the movie. I'm not sure if I want to wake up on the floor with a donkey in the house and the couch in the front lawn. The only problem I'm running into is trying to find something to wear!