They (the mysterious internet gods) say you need to burn around 3500 calories to burn a pound of fat. Kind of vague and intangible, right? But when you measure calorie burn against you favorite libations... well that's kind of fun and a bit more tangible. Assuming your calorie intake for the day is even with your daily allowance and you want to earn some pints without costing you pounds... enjoy.
*This is for entertainment purposes only and should in no way be considered a guide or recomendation for the consumption alcohol (see about me below).