Unanswered Questions about Halloween Costumes

I've been invited to a Halloween party with people from work (takes place on Halloween itself). Can't figure out what to do in terms of costumes. Main options under consideration:

1. Reuse the Lady Gaga costume that I wore to my students' party. Pro: Already own. Con: the Lady Gaga look may not be appropriate for wearing with people from work.


2. Christine O'Donnell. I'd wear a suit and pearl and a witch hat and a tea bag pinned to my lapel. May also hunt down a cheap flag lapel pin. On the plus side, I already own all of this (except for the flag pin.) Con: Kind of lame.


3. Use my not-used-idea from last year: Okapi. I would need to acquire brown animal ears.


4. Stay home. This is the favorite option of poorly socialized mathematicians. Even though I work with computer scientists, I am still a poorly socialized mathematician.