2 or More
Everyone sits in around a table with a shot glass in the centre (Normal glass if you need to make it easier). Each player should have a couple of 1p coins each. Someone starts by bouncing a 1p coin off the table and into the shot glass. If the 1p coin goes into the glass, that person fills it with their drink and nominates someone else to drink it. It then moves clockwise around the circle to the next player.
If a player misses the glass completely, it them moves onto the next person. If a player misses the glass completely, they have to take a drink of their own drink.
If a player manages to bounce the 1p into the glass three times in a row, they get to fill it with a shot of choice and nominate someone to drink it. If you miss 5 times in a row you have to fill the shot glass up and drink it yourself.