Fill a pint glass or party cup 3/4 full of beer. Make the foam clear. Take a shot glass and make it float in the glass of beer. Each person must pour at least a drop of their drink into the shot glass and it must float for 3 seconds. Each person takes a turn until the "Chalupa" is sunk.
Whoever sinks the "Chalupa" must chug the beer in a minute or less with the shot glass still in the cup. If they do not drink it in a minute or less they then have to drink another full beer in a minute.