Someone pointed out that these most likely had a United States Elevator Co. mod at some point due to the door tracks and the metal lips on the exterior doors, but I have a feeling that these were modded more than once. I’ve never seen that style of button in a California compliant version, and it seems even then like the Adams version is more common.
If I were to go to that hotel, I would just go to what is the highest floor because going to locked floors without a key is trespassing, unless I have a key and staying in the hotel, but nice video you made.