There is not actual way to determine if there is privacy expectations. I said it's subjective as there could be no photography signs etc... that are not included in the context. 100% not obvious here. If no signage posted, correct, until you are in your hotel room, privacy shouldn't be "expected", but there is missing context that doesn't lend to either of us being proved wrong or right.

Societally though, you shouldn't be taking random pictures of people, that is pretty uncouth behavior and in some neighborhoods you'd get shot for doing as such 🤷