Quite frankly, I have yet to be asked not to vape ...anywhere. In today's economic environment I don't think many palces can afford to turn away any group of people (unless in their economic interest to do so). So, make your list & DO inform the owners (not just some kid manager) that they risk a boycott from a sizable & growing group. Stick up for yourselves. It may look like smoking, but it's non-harmful to others. Personally, I don't flaunt it, and nobody bothers me. Be cool & be stealthy.
I've found that even anti-smokers, not nicotine Nazis, don't have an issue with them. In fact I've been complemented on the sweet aroma they pick up and asked questions to suggest to family and friends they know that smoke.
Let's face it, there are the nic Nazis and the hardcore smokers that are so set in their ways that nothing will satisfy them but acceptance of their ideology. Then their are the rest that are open minded and just need some gentle nudging to be on our side.
Same goes for smokeless. You won't believe how many people think the only type of smokeless is "spit" tobacco as the Nazis have renamed it to be as offensive as possible.