This is a quote from the link:
"...What's Allowed and What's Not
You're good taking one or two quick selfies just about anywhere on a casino floor these days. Most tourists do anyway. But photograph an active-play table, even in the background of your selfie, and you're taking more of a chance. In addition to potentially violating guest privacy, the casino may be concerned that your photo is part of a cheating scam.
If you want to gauge the speed of a casino's security response, then photograph one of its cashier's cages. You may not even get a warning before being escorted out. There's almost no justifiable reason a casino can see for snapping such a photo other than plotting a future robbery, such as the ones committed at Resort's World and Gold Coast in November 2022. ..."
https://www.casino.org/news/vegas-myths-re-busted-its-illegal-to-take-photos-in-a-casino/ (https://www.casino.org/news/vegas-myths-re-busted-its-illegal-to-take-photos-in-a-casino/)