I pretty much vape only where I would regularly smoke, with few exceptions. This weekend, for instance, I was at a football game. Smoking is not allowed anywhere in the stadium, I don't think. I didn't vape at all while in my seat, but when I was walking up and down ramps in a big crowd I took a couple quick hits. I wouldn't really call it stealth vaping, as I didn't really try to hide it. I would just take a hit and hold it until my PV was back in my pocket. I still exhaled vapor but no one ever noticed or cared. I only discovered vaping this spring, but I'm guessing that in the winter I'll probably do this more often, since everyone will be exhaling vapor anyway.