Of you throw a four it is a free card. It doesn't count as anything and is an automatic social. All players drink on a social, and the person who through the last card leads off. Which means he can make anyone on the table drink. Or you can simply hold it up in the air and let them fight for it.
Teams line up across the table.
Each member of the team has a cup of beer in front of them. The first 2 members of each team start by chugging their beers. Then place the empty cup and the end of the table and try and flip it over so it stands up on the rim. Once the cups is flipped over the next person chugs their beer and flips the cup over. The first team done wins.