The website for the Ovation Rewards program mentions that the Oklahoma City 21C Museum Hotel will be leaving the program at the end of 2023 as it will no longer be branded as a 21C Museum Hotel. It also mentions that the Lexington and Nashville 21C museum hotels will also be leaving the program at the end of 2023 but does not mention that they will no longer be branded as 21C museum hotels, so I'm not sure if this means they are leaving the Accor program or the Ovation Rewards program.