I vape anywhere and everywhere. The only place I won't vape (where I actually would have had a cig, previously) is in a swimming pool; too easy to damage a pricey piece of hardware.
I'll stealth it, sort of... my all day unit is a clear box mod with a color-changing LED inside (cool as hell, the whole thing pulses red / blue / green when I hit it), but I'll switch to a plain black box when I don't want to be too obvious, like at the movies or in a froofy restaurant. Same goes for juice; all PG in those situations, so I minimize the 'plumes' and it's easier stealth.
If anyone complains, I'll knock it off, of course. If that's a business, I'll be taking my money elsewhere, too. The thing to remember is that there's a very small, very vocal core of anti-smoking zealots around, and there's absolutely nothing you can do to appease them. If we act like it's smoking, it's easier for them to treat it just like smoking and convince the rest of the public that it's the same as smoking. It's that "rest of the public", the vast majority of non-smokers who probably don't like smoke, are glad that some places are smoke-free, but don't foam at the mouth at the sight of someone firing a ....... those are the ones we need to reach out to. If they never see vaping in any other context than being stuck in the cold/heat with the other lepers, it's harder to convince them that yes, Virginia Slims, there is a difference.
Voluntarily segregating ourselves as if we were still smoking plays right into those ASH-holes' hand.
John Q. Nonsmoker sees a measure on the ballot to ban e-cigs under the same existing, draconian anti-smoking ordnances.
Scenario A: John has never seen anyone vape in any other context than that of a "smoker"
Scenario B: John has met and talked to vapers in situations where smoking isn't allowed. He knows it doesn't smell, isn't dangerous to him or his family, and probably knows and loves some smokers that he might mention vaping to because of those encounters.
How do you think he's going to vote?