As for horrible hotel stories, well...
During the bus & truck tour I did of Anything Goes, we stayed in a couple of very "interesting" properties. The Ramada Inn in New Orleans had nice big rooms. Alas, it appeared that none of the tubs had been cleaned in weeks, if not months. I still remember turning on the shower and watching in shock and horror all the mildew and dirt on the floor of the tub start to "part".
Then there was the one in EconoLodge in Flint, Michigan (I think). Apparently, the property had just lost it's official EconoLodge franchise license: the "Econo" part of the big lighted sign out front was covered up. The linens were questionable. We were told NOT to use the back parking lot after 10:00pm. The double-locks did not lock. -And, yes, the first night we stayed there, there was some sort of drug bust in the back parking lot.
And then there was the Milford Plaza... Truly the smallest room I have ever stayed in. And one of the dirtiest too.