What kind of gathering/party themes have you hosted in the past?

Or maybe not even hosted, just attended that you thought was really unique.

I'm really getting into the art of hosting and my next party approaching will be an aphrodisiac themed lingerie/pj party (fresh oysters, wine, lots of flowers, charcuterie, not an orgy lol). Another one I plan on doing is a "where the wild things are" esq party, everyone must bring handmade animal masks.

Looking four more fun ideas, some will be probably $5 at the door some I may be able to cover on my own. I have a really great group of friends so anything is acceptable!