Best Drinking Game Ever: "Up The River, Down The River"
My favorite drinking game (and the most effective!) is one I learned in Greece from a fellow American traveler. It's called "Up the River, Down the River" and all you need is lots of beer and a deck of cards. If you're playing with more than four people, two decks of cards is better.
In my experience playing "Up The River, Down The River", everyone takes great pleasure in assigning drinks to the dealer! So make sure you're prepared to get wasted if you choose to deal the cards.
Each player is dealt 4 cards face up in front of him, and one player is the dealer. The dealer then places a card face up in the middle of the table. If any player has a card in front of him that matches the one dealt, he takes one drink of his beer. The dealer then places a second card face up in the middle, and if anyone has a matching card they take two drinks of beer.
The dealer next places a third card in the middle, and anyone with a match drinks three times. This step happens one more time and anyone with a match must drink four times from his beer. This is the end of the "Up the River" portion. Hardcore drinkers may want to add one more rotation of this step, but that can be dangerous, so be careful!
Now the dealer places another card on top of the last one dealt as we go "Down the River." If anyone has a matching card in front of him, he assigns four drinks to the other players! These drinks can be split in any manner, or all handed out to one player. He can even assign the drinks to himself if he wants! This continues in the same manner as "Up the River", with players holding matching cards assigning three, two and finally one drink to any of the other players.
Now repeat with another round of "Up the River," and before you know it everyone is drunk! That's what make this one of the best beer drinking card games around!
Extra special warning - DO NOT PLAY THIS GAME WITH HARD LIQUOR! You will be drinking a LOT playing this game, and alcohol poisoning is no joke. Stick with beer or you probably won't last more than a few minutes before you're puking your guts out!