Ive been a member of worlds for a while now, only recently since Jan started going on a regularly/daily basis. It's nice and cheap but I dont think it fits what you need. I think the daycare only goes until 6 or 7, maybe earlier. There's no pool, but its open till 11. The only place that fits your description and is in that general area is LifeTime. Pool, Daycare, open 24/7, etc... I cant remember what they quoted my brother when he asked for his two girls, I think there's some sort of time limit on daycare but its nothing too short maybe an hour or two. Plenty of time to do what you need to do.
How much are you looking to spend on a membership?
oh and congrats on your weight loss so far.