Surprisingly, this is a rare game where the kids are sometimes much better than the adults. You might consider trying a kids versus parents match up at your event.
Divide party guests up into teams of 6-8 players and have each team stand in a line. Give the first player in each line a hard boiled egg and have them hold it under their chin. When the game starts the first person has to try to pass the egg from their chin to under the chin of the second person without touching it. If successful the second person attempts to pass the egg to the third person, then third to the fourth and so on. If the egg should drop or be touch at any time it returns to the front of the line and that team starts over. The first team to successfully pass the egg to the last person wins.