Golly, the response from "Woman's guide to" gives me a warm feeling. You folks are right when you say that I left out some of the details of exactly what I do and look for before I make things happen.
Clothes: Grays or brown clothes of a material that won't wrinkle are good so that you can mingle without standing out, and of course you do not want to appear as though you have been on your back, or other interesting positions. Pantyhose get in the way, so I wear stockings and a garter belt, without any panties. A loose sweater with a bra with front snaps allows easy access, which gets the fellas excited. I wear my glasses to appear less of a threat to the other gals.
Makeup: You should wear very little. It gets smeared, and its absence tones you down. The goal is not to be remembered by others at the party.
Help serve food: You must do this. It allows you to get a close up look at who is there. You see which woman is with which man. You can pick out two or three subjects to target and track their condition and positions as the night goes on.