Instagram photos printing machine.
"Ibis", the french hotel chain has a wonderful "pillow" logo. I've never seen anybody using this insight, although it was always very obvious.
The maid at the hotel calls the system after each cleaning.
Tips are tied to the service very much. Psycologically, it's very difficult to leave less tips, thereby appraise the waiter's work unfairly.
Carpet in the elevator shows the day of the week, it's changed every day.
Cleaning lady waits in the men's restroom.