Are hotel hot tubs private or shared?
It depends on the hotel. A private in-room or private-terrace hot tub is yours alone, used by no one else. A spa, wellness or rooftop hot tub is shared with other guests, often on a booking slot. The listing wording and photos usually tell you which, and a private one will be tied to a specific room type.
This is the trap. Many hotels advertise a hot tub when they mean a communal one in the spa, which is a very different experience from a soak on your own balcony at midnight. If privacy matters to you, you need to confirm the tub belongs to your room before you book.
The tells: a private tub is attached to a named room or suite type and shown on a private terrace or balcony in the photos. A shared one appears in spa or wellness photos, or is described as available to all guests. Every hot tub on Upgrade Suites is the private kind, confirmed with the property, never a shared spa.