Why do you sleep in a cube?

The 9 hour capsule hotel is a small cube that you sleep in!  The idea of the hotel is to stay for 9 hours then leave. You have about one hour to eat, seven hours to sleep, and another hour to shower and rest. You get only one night to stay and sleep compared to a normal hotel where you can stay for days or longer. I would like to stay in a capsule hotel because they look comfortable. They are small but cozy and the things there look nice. The lobby looks nice, the shower area is also nice. Would you like to stay their?