I don't vape on flight either, well unless I lucky enough to be invited along on a private charter, then I ask and, it is usually fine. I flew w/o smoking except on one occasion in a private jet, so why should I need to vape any more than I smoked? I also respect no smoking laws and, if it's posted, I refrain from vaping just as I would have from smoking, or I don't patronize the establishment.
Now offices and such, I ask if I am to be in a lengthy meeting. Most do have smoke breaks so, it's simply asking if i must step outside, or if I can vape in the comfort of the building while smokers have a puff outside.