This is probably the most-often-asked question in Nevada sportsbooks. The answer is yes, they are. Normally, you have to ask for a voucher for a “free drink.” The amount required for a complimentary drink varies from location to location. In a visit to the Cosmopolitan of Las Vegas in December 2017, a ticket seller in the sportsbook said a bettor had to wager $300 to “earn” a free drink.