For paying members, it's a $75 join fee, then $60/month for a family of four. Most classes aren't free, but cost between $20 and $40 at the "discounted" rate for members on top of the monthly fee.
They taught my kids to swim, and we had some good times, but it's not worth that much per month, IMO. They do hire some very nice young folks as counselors.
**Edited to remove negative comment. Not fair considering there's no one present to defend.