I was a member of Nordfit, located opposite the big Centre 11 Coop, north of Oerlikon station.

It's a fairly nice gym with lots of classes if you want them and a good selection of machines. It was a little light on the free weights I thought.

It was around 100/month, but my problem with them was the fixed period pricing. You could pay 6 or 12 months in advance, but even after completing a 6 month block they would not allow me to switch to a monthly plan. Since i wasn't sure how long i'd be there, this was no good.

Another example of Swiss inflexibility driving away a customer i'm afraid. I now use the free gym at my office.