Rocky Horror -- went to many a midnight showing during my college days in Chapel Hill. Fun times!
However, like collyk, I can't do a midnight showing now, even with Geritol. Not only is it wayyyyyy too late for this boring old gal, I don't have a cart, and riding my bike home at 1:30-2 am is not in the cards.
Hope you all have fun, though -- I'll be there in spirit!