An interesting card game involving math.
The object of the game is to play cards into a pile and have the value of the pile equal 99. You start off by dealing four cards to each player, then turn the top card over. Play goes around the circle with each person playing a card, mentally keeping track of total value of the pile.
Socials occur whenever the total equals a number ending in 9. Special socials on 69 and 71. On special you must drink twice.
Whoever gets hit with 99 must drink 1/2 glass.
After you play a card, draw another from the stack. When out of cards, reshuffle those already played.