The system of using the cards to access the elevator, then the hallway, then the second door into your particular hallway, and finally the door to your room, was a real hassle, because half the time it did not work. Maybe you'd get up to your floor, but then couldn't get into your hallway, so you'd try to go down to the service desk, but then the card didn't work in the elevator, so you were stuck in some upper hallway, etc. And once you got into your room (after three trips back down the stairs and up again) you were supposed to know that the reason your room was pitch dark and none of the light switches worked was that again your card key needed to be stuck in a slot in the wall, which of course you couldn't see because there were no lights!