Well.... I can tell yall honestly that Crowne Plaza Hotel room safes do NOT open with "0000."
I recently went to a wedding and stayed over nite at a Crown Plaza. I'm not a big fan of room safes or any safe that is not mine, directly, but my mom wanted to put some jewelry in it while we went out for dinner. Had a heck of a time trying to figure it out, how to set your own code and had to have guest services come and show us. He opened it with a key... not a code and helped us to understand how to enter a code.
So.... I'm just guessing here... but I think that EVERY hotel safe may not open with 0000... just my own thoughts, based on a recent experience. (( Or maybe he opened with a key to 'protect' the secret?! LOL ))
Also... speaking of creepy deads-ville towns.... yall should check out the town of Colma ( not to be confused with Coloma, where gold was found ) where, for years, it was a town of just cemeteries. They dead outnumber the living something like 4 to 1. Now they have a few stores and commerce.... but not much and it still remains 'the city of the dead' with something like 17 separate cemeteries.
In the late 1800's / early 1900's, San Francisco said 'no more cemeteries in the city limits." So Colma was created. The people had to dig up ALL the dead people in SF graves and ship them by trains ( in the dead of night ) to Colma for reburial. People called the trains the death trains or the ghost trains. Lots of famous people are buried there ( most famous and founding SF folks like Joe Dimaggio, Wyatt Earp and his wife, Wlm R. Hearst, DeYoungs, the Crocker families and so on.
It's a very interesting story that can be found online and in Wiki.