Minimum age for gambling in Las Vegas is 21 years and some hotels even bar people from entering casinos if they are not 21 years of age unless they are registered guests at the hotel. Even for drinking, one has to be 21 years old to do that in Las Vegas. Known for its casinos, people can play poker, craps, baccarat, slot machines, roulette, blackjack and many other games at these casinos. People can play poker, craps, baccarat, slot machines, roulette, blackjack and many other games at ...