Outcome...
I finally went to the party as one of those cycling ultra-geeks. I stuck about 40 cycling product stickers all over my most outrageous jersey and shorts, making me look like the ultimate sponsoring nightmare, added a few "I sell Avon products" and similar stickers, a "Will Bike for Food" sign, and a couple of "This Space For Rent" stickers. Most of the group thought it was pretty funny, and it was certainly easy.