For example, it is illegal to discriminate a tenant based on "source of income" - so if one potential tenant works for a startup and the other works for an investment bank, you can't choose the tenant who works for a startup over the other simply because of where they work. Nor can you legally advertise as such.
(http://www.aroundthecapitol.com/code/getcode.html?file=./gov...)
I totally get the desire to have an all-startup household, but I'm also raising this because I think we would be outraged if other fair-housing laws were being flouted, like discrimination based on ethnicitity or sexual orientation, and so I'm minded that it is important to respect the CA fair housing laws in their totality.