A very simple game really. Everyone playing must have ample beverage, since the game can go pretty quick.
Start watching the television. You can watch a movie, but there will be more drinking if there are commercials. For every major change in background music/sound, everyone consumes 1 drink. You can define drink to be what is generally acceptable based on the participants. I recommend a good hearty swallow.
This is a good game for a bunch of guys that just need one little reason and many large beers to get tanked. Have fun!