Where do you keep your bike when not riding it?

The most important thing is to keep your bike where it won't get stolen. Indoors, in an air conditioned space, is a really good idea. Humidity matters much more than temperature. Personally, I keep my bikes in my basement near the dehumidifier.

HTH

Doesn't HAVE to be air conditioned. But low humidity helps. Even in the basement of my own apartment building - I lock up my bikes with a good U-Bolt lock around a post and a cable through the wheels.

Here's a website with an example of what I use http://www.pcfastlane.com/racor-ceiling-mounted-bi...

Anyplace that is out of the weather and is dry will do.