I bet it's not 0.
Maybe securing it poorly on top of that.
Or if the places using it are in control of their own data, they'll be reselling it to data brokers because hey, free money. Doesn't cost them anything, just their customers' privacy.
They're not actively scanning your face in the club, and I question how good the facial recognition actually is.
Regardless, it's a private establishment, you don't have to go there and get your face scanned if you don't want to. You do have legal recourse, you can choose not to patronise that establishment.
I think it's fair to assume that anywhere that is recording video is running facial scanning, as they have the capability to. If it's not a legal requirement where you live for businesses (and government) to put signage where security cameras are in operation, that's a concern.
So the guy just looked at the passport and let me in.
When I can know where my Congresscritters are at every moment, every time they cross a camera's path. Who visits them, in public and in private. What shows they watch -- and their children and grandchildren.
Same goes for our tech lords.
You first.
Even if individuals just posted footage from their properties and some DAO actually did the aggregation, image processing, and posting, I bet any individuals connected to the effort would still get harassed by law enforcement.
Last time I was in a Vegas casino, I don't recall any signs (granted, it's been a few years). I do know that there are cameras everywhere, and casinos have been using facial recognition for a while.