How many glasses of beer in 12 keg?

A standard keg contains 15.5 gallons of beer. A standard pint glass holds 16 fluid ounces. There are 128 fluid ounces in a gallon, so a keg contains 15.5 x 128 = 1,984 fluid ounces of beer. A pint glass holds 16 fluid ounces, so a keg contains 1,984 / 16 = 124 glasses of beer.

Therefore, there are 124 glasses of beer in 12 keg.