Any guests under the age of 21 are not allowed on the gaming floor. This is in accordance with the Arkansas state law regarding the legal gambling age. In order to gamble at Cherokee Casino in Siloam Springs, you must be at least 21 years of age. What Are the Age Requirements at Cherokee Casino? This applies to all forms of gambling, including casinos, lottery, bingo, and sports betting. In Arkansas, the legal gambling age is 21 years old. What is the Legal Gambling Age in Arkansas?