This may be old news to some people, but it was a suggestion on another site I belong to, so I though that I would share it. It worked for quite a few people and I will be checking it out tomorrow. What this woman is doing is volunteering in the gym's daycare to offset her fees. I am going to see if I can get free family membership and daycare for myself to workout as well! I just closed down my own daycare business, so I feel a bit dense for not thinking of it sooner, but I hope it works for myself and anyone else out there! You don't have to have kids to do this, just be able to watch them for a few hours a week. If anyone else has done this successfully, let me know!

For years, I got free usage/membership at a very high end spa/gym in exchange for teaching a martial arts class.
A lot of Gyms offer free usage in exchange for services of any kind (teaching aerobics, daycare, ...etc). It's a good deal if you have the time to do it. It always ends up taking up more time than you think it's going to though - that's what makes it hard.
You just need to make sure that the gym you're working for has a good policy.

I wish I could work at my gym but they only hire stupid bimbos. They have a health bar at the gym I go to and one time I asked for a banna & strawberry shake. Shes like "whats in a banna & strawberry shake? Im like banans, strawberries, and skim milk duh! She made it and it came out really liquidly (she didn't put any ice in it) What stupid people they have working there. Then they flit w/ all the guys. One of them had sex in the tanning room. How gross! Good thing I don't use those facilities.