I don’t really get the nostalgia angle as it seems as many of those who are into this kind of thing are too young to have ever been in such a space, let alone worked in one. I’ve worked in a place like this that was well past its prime and though uncanny, it’s certainly not creepy. The illusion of infinitely twisting, identical corridors simply doesn’t hold up when you’re actually in a space like this, but only works…
Also, the infinite corridors is only part of the appeal. There are other ways in which such spaces can become eerie. I remember how I used to often be the only person still working in an open floor plan office in the evening. There was no sense of infinite corridors, but the dimness with one area alone illuminated by motion-detected light was spooky, and so were the sounds of the HVAC system and of doors and elevators somewhere in a different part of the building. There was also an uncanny empty feeling of seeing all the chairs and desks with no humans at them.