Many hotels have changed their policies in recent years due to unfortunate recent events and require that someone come in and do a security check of every room every day even if the do not disturb sign is up. Does that change the calculus of whether the rooms are reshuyot hayachid?
Totally not. רשות היחיד is about מחיצות, not ownership and property. And if your question was about requiring an עירוב חצירות, then this only makes it better since it just underscores the reality that you