A hotdog dress up contest
Be creative with your supplies but test everything first!
If you want to be thorough, dry the hotdogs off before you play
Encourage hand sanitizer after the game - just to cover your butt!
NOTE: The following supplies are mostly optional - so feel free to add or subtract to the list!
Whatever else you can think of
How to Play:
Divide your group into teams of three or so.
Give every team a hotdog (or several if you want the game to take longer)
Give every team a matching bag of supplies
Tell the teams that their job is to create a costume for the hotdog and the team that creates the best Halloweenie wins!
Assign some non-biased judges or have the crowd vote by applause.