my nieces (frosh college) play a game called quim. you play with a partner. the goal is to get 4 of a kind. the trick is that you can't go out on your own. instead, when you have a winning hand its your partner who has to call "quim!". So you have to watch your partner, etc. At the same time, if your opponent recongnizes that you have a winning hand, and they call quim before your partner does, then you lose. so its less about the strategy of building a winning hand as it is about the social interaction with your teammates and opponent.