I don't think it's lame to be
Clove.
I also don't know what you have lying around your house to throw a costume together with.....so idunno....
-Witch (You gotta have black clothes/dresses/shoes/fishnets/tights, right?)
-Faerie (If you have wings)
-Hooker (Who doesn't have skank clothes lying around?

)
-Punker (I kinda call lame on this, but that looks to be the type that are at this event youre going to)
-Random Celebrity??
I'm prolly not much help............