Win every time you gamble? Is that possible? It is if you play for comps. Every year, U.S. casinos give away more than a billion dollars worth of amenities to customers in return for their gambling action. These give-aways, known as comps (short for complimentaries), range from parking and free drinks to gourmet meals and airfare. Are you getting your share? From nickel slot players to $500 a hand blackjack high rollers, Comp City has shown tens of thousands of gamblers how to get free casino vacations.