Sit around a table in a large group. The first person must pour an amount of alcohol into a glass, depending on how arrogant they are feeling. They must then toss a coin and call heads or tails, if they are correct then the glass is passed to the next person. If they call wrong they have to down the contents of the glass.
Variation: Toss the coin twice, the result of the second toss determines whether or not you have to do a dare chosen by the rest of the table.