In my US Army days, we would donate blood to save money on beer. We called it "getting a quart low", and would then feel the effects of alcohol sooner, thus saving a buck or two on our meager salaries.
ETA- Our hangover cure was equally unorthodox. We would keep all of the expired 1 liter IV (Ringers Lactate) bags and jam them up. Stick the needle in, open the valve, and then sit on the bag. Pretty much a 100% reliable hangover killer.