you know....i hate working out but it may be worth joining a gym for the air conditioning....
My Y has really comfy couches in the lobby, and a little cafe. I never knew that Ys could be this nice. And I love their childcare. They have an under 1 room, and a room for 1-2 year olds, and a room for 3-6 year olds. I told DH that I have no idea why we're paying for preschool: they have staff leading arts and crafts projects and read stories to the kids and there are tons and tons of toys. And always lots of other kids to play with. And the room is HUGE, too: the younger kid rooms are sort of normal sized rooms, but the 3-6yo room is a giant atrium that's gotta be bigger than my whole house. They have a big Little Tykes climbing structure in the middle and lots of little areas set up for specialized play. The women who work in the childcare center are really nice and learn all the kids names after you drop them off a few times. And you basically have to get a DNA sample to get your kid back, so I'm comfortable with the safety aspect of it all too.
So, OP, I am fully in support of gym childcare, if done right. I'm sure lots of places don't do a terribly great job. I did tour one gym where they didn't have separate rooms by age, so all the babies were just strapped into their carseats the whole time in a corner. The whole room was complete chaos, with the older kids running around. Which is what older kids do, and what the 3-6 year old room at my Y is like... but it means that the babies couldn't be let out to lie on the floor or roll around or crawl. That was not acceptable to me. But a really good gym daycare can be a really nice break for both you and your child.