1) They take my kids.
2) I get an uninterrupted shower.
3) I have 30 minutes for uninterrupted reading if I use an elliptical machine (you might think this is not high-quality reading time, but this is not the case... I've read scholarly articles as well as Mark Twain's Joan of Ark and didn't enjoy either any the less).
4) If I take a class, there are other adults with which to have conversations that go beyond whether they need to use the potty or if they need their nose wiped.
5) They take my kids.
I may well turn into a gym rat.... :)