Maryland has long outlawed smoking in bars, but at the moment it appears to be ok (legally).
I vape in at least 3 different local bars, and never had a problem. I've had a couple of people make snide remarks about how it's bad for me, but no one has ever complained about actually being bothered by it. I usually vape a banana cream or strawberry cream I DIY and I always get compliments about how good it smells, especially from the bartenders (the most important people!).
I was recently in a bar, where I sit and vape several times a week. There was a bartender I'd never seen before, so I don't think she works often. I was vaping as usual, with no problem. I was using my usual Provari with a Mutation X, with about a 1.3R single coil, and I go out of my way not to blow clouds, being as stealthy as possible. And I usually dial it down to about 3.2V from my usual 4V.
A guy comes in and sits down next to me. He's got a high wattage box mod, I think he was running 30W or more, with a dripper. He blows a huge cloud up in the air and asks the bartender if he can vape. She says no, and then something like not if that is what you are going to do.
I keep on vaping, my usual stealthy way. And I ask the guy why he doesn't dial it back. Well, he says he can't, his sub-ohm coil needs the power. So I ask him why he doesn't have a higher ohm setup for public vaping, like in bars. And I get all sorts of excuses.
So I keep on vaping, my way, with no problem from that bartender. And he can't.
And I shake my head... you can lead a horse to water but you can't make him drink. There is a moral to this story, I think.
Sooner than later I won't be able to vape in those bars (due to new ordinances, not owner policies). When that happens they WILL lose most of my business. It's not a principle, it's just that I have been spending more time in bars and restaurants lately. I got out of the habit when I was a smoker and my cigs were given the boot. There is just something about sitting at a bar and enjoying a smoke (now a vape, I no longer smoke). Or having a cig after dinner, the same way other people can enjoy an after dinner drink. Without going out in sub-freezing weather to do it. But there aren't enough me's to matter, and so on...