It sounds like you are asking the right questions. I concur with the suggestions that you visit a few gyms that have the features and classes you want. Many of them give one or two-week free passes, as well, so that you can experience the commute, etc.

ITM, if you feel like exercising, I need people willing to walk with me once or twice a month (I am trying to line up enough walking partners to have company for one two walks a week) and I would welcome your company.

I am also looking at memberships - possibly at the same Ffx gym you are considering (the one with the pool?). I used to go there (a few years ago).