Is there a public indoor tennis courts in the area?

I am both new to Cincinnati and new to tennis. I am taking lessons at Harpers, but would enjoy playing more than one hour/one day a week. However, I am not in a position to join a club. Are there any public/pay by the match indoor courts in the area? I am in Montgomery, but don't mind driving 15-20 minutes to play.

Thank you for your time,
Tracy