Hand sanitizers in elevators
Three observations:
- Everybody is just waiting inside an elevator.
 - Taking an elevator is likely one of the first and one of the last things people do in the building.
 - Especially in tall buildings, everyone takes the elevator.
 
So, if you put a hand sanitizer in the elevator, you’ve got a good chance people will use it. The same reasoning goes for just outside the elevator, where you’re waiting for the elevator to arrive. I think it’s a very natural place for water-free hand sanitizers.