Considering what I went through in PE classes as a child, I'll never EVER set foot in a gym as a customer. Call that irrational if you like, but it will simply never happen.

That said, I do need to excavate my exercise machine and use it every morning; I have a sedentary job and I simply need to exercise regularly. It's just a matter of finding the motivation, aside from knowing intellectually that I need to, that exercise is one of those things that's good for you pretty much no matter what's wrong with you, etc.