We did the white elephant exchange at work this year. Anyone who wanted to participate did, those that didn't simply didn't bring a gift. If you brought one you received a number and it's duplicate was put the drawing dish. It was the last item on the day's agenda. If it was your choice, you could leave. However, almost everyone stayed to watch. It was quite hilarious. Our instructions were a usable item, cost should be less that $5, a regift is fine and no trash. Because we all have a wicked sense of humor, it was pure entertainment. I'd join the fun again.