Best thing I can tell you is Green Beans. You can have all you want, and then some, but I'm the first to admit it just doesn't sound very festive. Are you doing dinner, or just snacking around? Most nuts aren't too bad. Chips, whether potato or corn are darn near lethal. Shrimp coctails and stuffed mushrooms come to mind, depending on what you stuff them with.
Not much help, but maybe someone else will drop in.