While my last con Game is simple, and could be easily enough done, this is just something that came to mind... w
This little game takes place at cons, and focuses on getting folks together for a party or the like, the basic concept has each vorish player put a standardized print up on there hotel room door, when the door is knocked on/opened the people inside are either prey or pred, if the folks are prey they are collected by the roving pred and follow him on his rounds..

Should a player knock on a pred door they themselves are gobbled up(Along with all the rest of the following people, and thats where they stay(Assuming a sole pred room), or the room switches from pred to prey so the next person who comes gets to take everyone off more.. once all the printouts on the door are gone the games over and everyone should be snuggly wrapped inside a hot steamy belly in the planned on game room.

By its nature the initial players are preds(though pred/preys actually is optimum), and it works best if they have texting in some way to make sure they collect all the people who do want to join in the party. Furthermore one pred per con hotel is needed