I've seen mention of places people have vaped without issue, but no real list. Maybe we can get one going? I can start with the Chevys at Stonestown in San Francisco. 
Not to flame or rag on your idea, but I don't think a list like this will be useful/possible. I say this because for most chain locations it will be up to the managers, and the opinions will change per establishment. Possibly as people become more aware of vaping, some corporations will greenlight it in all of their business, but that is a while off. I think list like this would be best placed in your local social group, so everyone knows what options are around them locally. Again not meaning to flame or anything.
I've vaped in the mall.... which was a little scary seeing angry moms flashing death glares at me lol and I've stealth vape at IHOP![]()