Have each guest put on a pair of very large sweat pants and sweat shirts. Spread a bunch of balloons of various sizes all over the floor. Whoever has the most balloons in their sweats wins. It is a lot of fun to watch the kids develop strategies and they look so cute when the time is up. Mix tags thoroughly before writing names on them to be sure couples do not receive their matches.
Guest find tag mates, check in with host to verify correct matches and claim prizes.
You can adapt game to theme. This game can also be played with other accessories that come in pairs. Promote seating cards at even a small dinner party. For large groups, instead of putting guests into a certain chair, you would direct them to a specific table, or in other words, reserve them a seat. You can either spend hours laboring over placing guests at tables where they will find compatible conversation or you can play a little gambling game and toss the names in the air and let them land for some real exciting interchange.