Set out an array of brightly colored soda bottles as a consumable centerpiece. Write guests’ names on ribbons, then slip them through key-ring bottle openers; lay one at each place setting for self-service with good cheer (and added value as favors). Your friends can find their seats, grab a bottle, and raise their glasses in a party-starting toast. Key Bottle Opener Key Chain, $3, Wishbone, 415-242-5540.