Fitness classes without gym membership

Does any body know of a gym where they do fitness classes - ie aerobics or step or something, where you dont actually have to join the gym! I cant afford the memberships here but if there is somewhere you can just join a class and pay for that Id be up for it.

Any body else fancy coming along for a giggle if we find one? Im not a fitness fanatic, Ive just drunk too much German beer and need to feel fitter again!

try hochschulsport they have both step and body workouts.

you dont have to be a member of the gym to do these. Also if you are a student then its even cheaper.

I was a member at On Stage and they have tons of classes- you do have to be a member but it only costs like 30 euros a month. A lot of the teachers speak English as well and there are 4 locations so one is probably near you.
This is a list of the courses they offer
http://www.on-stage.de/seiten/kurssuche.php
the price says 44 euros but they are always having specials, I only paid 29,99 a month for my membership which is less then paying 10 euros a week for one class.

If you don't mind going to classes in German (it's pretty easy to follow along with the crowd) Sportspass is a great deal. Membership is less than 9 euros per month and there are hundreds of classes offered all over the city.

I would be very much up for joining some classes.
I just looked at Hochschulsport for the first time and it sounds very good. I did not know you could take classes there as a non student so I never checked it before.
The prices are very good and the courses only last for about three months.