Christmas Games and Get Togethers

We are having friends over for a little holiday cheer this Friday. We wanted to do a little get together to celebrate the season and each other. We are planning a potluck dinner where everyone brings a side or dessert and we are providing the main course.
I was thinking of playing a game or activity that would bring out the competitive side in our guests (everyone loves a challenge, right?), but I didn't want it to be something everyone would be like, "oh great a game."
Does anyone have any suggestions on a good adult group game?
I would love to hear your suggestions!

All the best,
ChitChatChic
Jesse