I go along with occasions, but not 'certain places one would never vape.' I'm very interested in one who mostly agrees with my take (that would be you
@pluviose ) explaining to me what about these particular places makes it wrong/bad to vape in there, for practical reasons.
I guess I would also stipulate that with idea of different vape devices have different output. Personally, as one who doesn't use big devices that produces a lot of exhaled vapor, I still wouldn't see the issue with these places you mentioned on at least a few occasions. With little device I use, that would transfer from a few into many, but surely not all.
For me, an obvious situation to not vape is when more than say 5 of us are congregated into a space that is say 30 x 10 feet (or smaller), ventilation is likely poor, and for at least next 5 minutes there is strong likelihood that a non-vaper could enter the area, while the 5 of us remain, puffing away. For me, this would include a vape shop (that is open to non-vapers, which I would presume all of them are). It would also include some outdoor areas. Even then, I wouldn't assume harm that is likely to occur to anyone in that situation, but could see how it could be annoying (even to vapers).
But if the same amount of people were vaping in a Wal-mart sized building spread out, I would not understand how it would be seen as consistently annoying by anyone. Would take an overhead camera angle that is edited down to 10 seconds and happens to capture a vaper exhaling right when they turn an aisle corner and into close proximity of non-vaper. Even then, it could be treated as bumping into someone in public inadvertently, and thus dealt with a "excuse me, my bad" and neither person care and each go on their merry way. While I do acknowledge that it might not go that way and that person who does get face full of vapor, might be like "what the heck? Damn that's annoying."
It would be to me, fair game to discuss 'vaping etiquette' in the wal-mart sized building and present the many situations where it would plausibly be genuinely annoying to general public while also showing the many instances in same situation where it would be very okay/not annoying in that same building. A 10 minute video ought to be able to capture that.
On review of the places, the food store / restaurant is the only one that comes off as 'obvious' to me for place that I would think many / most people would say is not a place to vape. But even there, I can easily see how vaping etiquette comes into play and that situations could be shown, rather easily, showing that it is perfectly acceptable to vape in that location, while many situations in that location would not be acceptable to most people.
But alas, I don't know if human civilization will ever get to place where we are open minded enough to discuss vaping etiquette for indoor places. It's nice to think about, though.