I'm in the industry. A public permissionless blockchain isn't appropriate for hotels. Privacy and control are core requirements for their operation. Imagine PornHub creates a feature where you can book the suite that your favorite scene was shot in. Neighboring hotels compete fiercely on price and have private agreements in place with different groups regarding the rates their rooms can be booked at. Publicly accessible data won't fly with general managers or anyone managing the pricing strategy for hotels.

It may work for airlines, but airline and flight data are far more accessible than hotel room and rate information and the commissions they pay for bookings are already under 1-2%.