OK, I have a good costume idea. I have no intention of using it, so go ahead. A friend of mine did this in high school and won a contest with it. I always thought it was hilarious, but never actually did it myself. Her head was the centerpiece of a table set for two. She took a large piece of cardboard and cut a hole in it large enough for her head to poke through. Then she did the same with a small table cloth. Then she glued some cheap plastic plates, cutlery and champagne glasses onto the "table", and surrounded her head some fake fruit. I wouldn't go on Space Mountain with this get-up, but if you just want to walk around and soak up the atmosphere, I bet this would be a fun idea. And if you do it, I want to see some photos!

