Hi M.. I totally know your frustration first hand. We originally joined the EMH and ran into the problem of the child care being full at the times I wanted to work out (specifically take a group exercise class). It was ridiculous. I searched around and found the perfect gym.
Urban Active
http://www.urbanactive.com/trainerfinder/websites/60092/c...#
The one in Westlake (Crocker Park) would be your best bet as far as location goes. The best part about the play room is that there is no limit, no waiting list, they have a separate area for small babies, a large main area for 2 - 7 year olds, and a back area for older kids 7 - 12.
This has worked wonderfully and my 3 boys really enjoy going and playing with the other kids. The staff is fantastic and seem like they really care about and enjoy the kids. I seriously have nothing negative I can think of to tell you about it.
I pay a separate monthly fee to have unlimited playroom access and it's about $16 a month. It's so worth it since I am there 5 times a week.
I hope you'll check it out for yourself. I think they are offering the gym membership part for the month of May for free.
And let me know if it works out for you. I'd love to say hello to a fellow mom of three!