Settling in questions (Zurich)

Hi, I am new in Zurich so have a couple of questions on which I would highly appreciate some feedback

1. Which is the best bank if I just need a simple savings and a credit card?

2. Which is the best gym in town?

3. Any recommendations for German classes - I am a professional person in my thirties and would have to do it at night.

Thanks so much!
Adriana