Drinking games - Bottle (or Buzz) - Do you know your 7's?

This is a drinking game that we've been playing a lot recently, especially while we pre-game before going out to the bar/club. It seems real simple but it's tougher than you think. Like all drinking games, it's a way to compete, have fun, and get drunk with a group of friends. There are different variations but I'll explain the easy way.

RULES

Have your group of friends sit around in a circle. One person in the group starts by saying the number "1". The next person (the person sitting to the left or right, choose an initial direction) says "2", then the next person says "3", and so on and so forth. When someone gets to the number "7", that's when the fun begins. Whenever you get to the number "7" or a multiple of "7" (ex. 7,14,21,28,35, etc) or any number that has a "7" in it (ex. 17, 27, 37, etc.), that person must say Bottle (or Buzz, that's what we've been calling it) Some people call the game Buzz, some call it Bottle. Anyways, whenever someone says Buzz when they're supposed to on a "7" number, then you switch directions. That means if your group was counting in a clockwise direction, then you switch to counter-clockwise after Buzz is said.

WHAT COUNTS AS A MESS UP?

If you mess up, then you drink. This game is a fast moving game so if someone stalls and takes a couple seconds to think about whether to say a number or say buzz, then that counts as a mess up and you drink. If you say Bottle or Buzz when you're not supposed to, then you drink. If you go out of order, you drink. How much you drink depends on how drunk you want everyone to get. Some people play when you mess up, then you have to finish your drink. Some people play when you mess up, you have to take a shot. I guess it depends how hard your group is. Also, when anyone in your group messes up, you let that person drink and then start over at number "1" again.

OTHER NOTES

When and IF your group gets up to the numbers, 70-79, you basically have a duel between two people since the order is constantly being switched back and forth. The two people should say Bottle or Buzz 5 times each since 70-79 all have the number 7. It rarely gets that high because people aren't that good at counting that high without messing up and most people are pretty drunk and there's always someone in the group that messes up before that point.

The highest I've ever seen it go was 146. My friend messed up on 147. He said "147" instead of "Buzz". It was a great game but I guess all good things must come to an end.

This game is really fun especially if someone in your group is not good at counting because that person will most likely mess up the most and thus, drink the most. A person who isn't very good at counting usually gets smashed pretty quickly. And obviously, as you get more drunk, the game gets more difficult.

LIST OF BUZZ NUMBERS (1-100)
7,14,17,21,27,28,35,37,42,47,49,56,57,63,67,70-79,84,87,91,97,98

ANOTHER VARIATION

It's the same rules as I explained above but some people play an advanced game that involves the numbers "7" AND "11". This means all multiples of 7 and 11 AND any number with a 7 in it are Buzz numbers. This makes it much more difficult and people just mess up way too much and get drunk in a matter of minutes.