I stealth vape in my cubicle all day. Nobody is, or will ever be the wiser. I don't blow out clouds of vapor, I hold it in until it is gone. As far as anyone is concerned, I'm just chewing on the end of a pen.
If I brought the issue to management, they would be quick to ban it in the building. It's just a fact. I know the environment I work in. I doubt I would be fired if caught, since my manager likes me and I am a valued employee, but they'd probably tell me I couldn't do it anymore.
Exactly my situation. I have been stealth vaping at my desk all day for 4.5 months, a few friends know, but that is it. I assume that managment would not approve if I asked, so I just don't ask, and don't tell.