I am partners in a student run bar. Since December is kind of a slow month do you guys have any ideas for a good charity event to throw?

Heya, I am a partner in Atmosphere and I was wondering what would be some ideas for a good charity event to put on next week. Any good ideas for charity. I am kind of partial to the ASPCA but open to anything. The tricky part is thinking of an event that ties the theme of the charity.