Opened in 2004, the WinStar Casino in Oklahoma, owned by the Chickasaw Nation, has been a destination for poker enthusiasts for nearly two decades. Remember that you must be 18 or over to play poker in The Sooner State. Oklahoma is also home to some surprisingly big casino resorts. There are over 10 Oklahoma poker rooms in the state that offer a mix of Hold’em and Omaha cash games and tournaments. Most Popular Cardrooms in Oklahoma Reviewed Looking for a top Oklahoma poker room? With our guide, you can discover the best places to play poker tournaments and cash games across The Sooner State.