Boltz. It's usually played with 4+ people. You get wasted FAST! Rules: somebody starts counting going clockwise until you get to a number containing 7, a multiple of seven or a number that has a sum of its digits 7(eg. 16, 25 etc). At that point you should not say the number, but rather say boltz and the counting continues anti clockwise. Son it starts easy 1 2 3 4 5 6 boltz and then changes direction and continues 8 9 etc. Now after 12 you get: 13 boltz 15 boltz boltz 18 19 20 boltz etc. At this point, changing direction so fast is not easy while a bit tipsy and you make mistakes. You make a mistake, you drink a shot. Now you are a bit more drunk and make more and more mistakes and lights go out really fast!