Bad or maybe just weird possibly dangerous?

I rented a room for one night out of necessity. $140 for one room barely big enough to contain the bed and TV with no windows. To paint a picture it was one of four rooms that shared a common area. Never met the host, was given a code for a lockbox to obtain a key. Let’s say the code was “1234”. I open the lockbox and get the key and realize each lockbox had the same code. I figure this out because none one other guests bothered to spin the dials on their lockbox, each was still at 1234. Pretty stupid all around but whatever. The entrance to the building had a latch with a keypad on it, my key doesn’t fit so I punch in 1234. Door opens. Walk in, get to my room, same deal. Key doesn’t fit, 1234 and the door opens. I never found out what the key was for other than to let potential serial killers know how to access the bedrooms. WTF?