When I started vaping, I was nervous about vaping in public. Even, to a certain extent, in bars.
But now I've been vaping for a year, and I've gotten pretty complacent about it. I vape in restaurants on a regular basis, in bars, wherever I happen to be. I've vaped in front of cops on several occasions. I don't ask permission, I just do it, and it really hasn't been a big deal.
Most of the time I don't stealth vape, but sometimes I do, depending on the situation. If there are kids around, for instance, I don't want to have to explain it. I stealth vaped in the hospital while visiting my mom. In that case, I walked around the corner from her room, where there was a bank of elevators, nobody in sight, and stealth vaped so I wouldn't have a big cloud there if someone walked around the corner.
So far, I've only had one occasion where I was told "You can't do that". And in that situation, it was large bar and the manager had sent an employee over to tell me I couldn't smoke. The employee, naturally, was following his bosses instructions. Once I figured that out and wen to talk to the manager, I didn't even have to explain things. As I was walking up to him, he saw my PV and said "Oh, it's one of those, go ahead, you're fine".
In the Dallas area, there are several vape shops, and I usually carry their business cards. When people ask about my PV, I give them a short explanation, and tell them that I was a heavy smoker and that vaping has been wonderful for me. Then, if they seem at all interested, I give them cards for some of the local vape shops. I like to give them at least 2 different business cards and tell them "I'm not associated with them, and these guys are competitors. I'm just so happy with vaping that I want to help others quit smoking, so I carry their cards".
I give out a lot of business cards. I'll be on my way into a building, someone will be standing outside smoking, and I'll give them a 30 second explanation of vaping and a couple of business cards, then go on about my business.