The typical 1/2 barrel keg holds 15 gallons of beer. If you consider that there are 128 ounces in 1 gallon, that mean that there is 1920 ounces in a keg. Now if you are referring to the standard 8 ounce cup, this means there are 240 cups in that keg. However, if you are meaning a 12 ounce cup which is the typical size of a bottle or can of beer, that means there are 160 cups of beer in that keg. At any rate, that is a lot of beer. So, when’s the party?