Vaping does have a scent and some can detect it, but it's not something that fills the room. I've blown vapor toward non-smokers when they asked about it. My non-smoking doctor allowed me to demonstrate mine in his exam room. I blew a good hit of RY4 in his direction and asked him if he smelled smoke. He said, "No, in fact I don't detect much of anything at all". After my demonstration, he did some research from my links and his AMA links and put some pamphlets in his waiting room with a poster card that said, "Trying to quit smoking? Try this!"
I vape in restaurants and fast food places, malls, and just about anywhere without objection. It's hard to stealth vape a Provari, but no one complains. I release the button right before I stop hitting (to minimize sidestream vapor), blow it downward across my shirt and it withers away.