At the least, bed bug infestations.
That ain't funny. Remember, I was a railroader for 20-plus years. Crew dorms at away-from-home terminals went away in 1975 or so - forbidden by the FRA, because of the horrific conditions they offered. Typical was the PRR Conway Yard (Pittsburgh) dorm - still used as an office and classroom building, with the dorm area turned into storage.
It was 300 feet from the "retarders" on the switching hump. The retarders press on the insides of the railcar wheel-sets, to slow speed if they come down the hump too fast. The screeching noise is terrific.
Okay. What replaced the dorms wasn't much better - bottom-tier hotels and motels. Not (quite) residence hotels; but just a step up. CSX, when they entered the picture in our area (bought part of Conrail) put up their own new hotels, to ward off complaints and stop struggles in soliciting bids. Franchised brands, typically Southern brands. Trouble is, CSX was Woke before Woke was a Thing. Hire an army of scum to run the new hotel, and it becomes a flophouse in weeks.
To the point: BEDBUGS. Yeah. The CSX-covert-hire hotel staff, would rent, over and above railroad needs, not so much to the public - few would come. But to the by-the-hour trade. I really feel for the schlub johns that bought some of what was being sold; because hours later, with allegedly-fresh sheets, a lot of our crews got bed lice.
Not just a couple - it was a big enough problem that we had a special union meeting about it.
I've been REAL conscious about hotel cleanliness since. In my traveling days, I'd stay at Holiday Inns - they actually did a good job, pre-Plandemic. Since, I haven't had the money for leisure travel. I wonder how they are, now.