Here is another pattern for you - GameGamble. I was considering gift exchanges at this time of year. I think the concept of being able to "steal" others unwrapped gifts is pretty common, and makes it a lot of fun. However, at the one I attended recently, the presents weren't unwrapped till the end. "Stealing" took place on sheer speculation: if was big, or wrapped nicely, maybe its a better gift, or maybe not. Very similar to game shows: do you want to keep your accumulated money, or do you want to trade it for door number 1, 2 or 3? GameGamble is a solution to creating chance, risk and tension in a game by requiring players to choose among several options - options that they do not have a lot of information about.