>For me, I've always called it the "school at night" phenomenon.

It's funny, I've always loved that kind of environment. Quiet high school hallways after everyone's left, empty university buildings late at night, offices after hours, even empty offices that haven't been moved into yet. For me it evokes feelings associated more with watching a rainy day from inside, or lofi-girl with headphones studying.

I understand why it can evoke horror or unsettling feelings for people, but for me the first word that comes to mind is just "peaceful".

Even the environments in the Backrooms trailer - minus the obvious horror elements - look like they would be a lot of fun to explore!

I agree, it's the night-time that makes places, particularly urban ones unnerving and/or creepy. I once worked as a courier, which sometimes involved delivering things to stores or weird ass storage buildings in the middle of the night. I hated those night-time deliveries. Even worse when I had to go through rooms with mannequins, made my skin crawl.

The smell of old cigarettes, stale coffee, Certs, and urinal cakes wafting through the air.