Making the situation additionally confusing is the category of games. If you were to be asked “How old do you have to be to go to a casino?”, you’d probably say 18, wouldn’t you? While in most situations, the answer would be correct, or to be more precise, keep in mind that each state has its own laws and regulations on what’s classified as legal casino age.
Minimum Age to Gamble in United States of America Betting on sports futures, props and lay bets.