Casinos typically pay winnings of less thanR$25,000 by cash or check. They may disburse larger winnings either as a lump sum or as an annuity. Some casinos won't allow you to choose how to receive winnings.
Short answer, they typically pay in cash. Certainly for any small amount say 5K or less, cash would be the default payment method. Most casinos would probably cut you a check or wire money if you requested it Certainly for any large amount, they would.