Any other city, there could be some reasonable explanations for crusty material that pooled around the drain in the bath tub.
A reddish pool of left-over plasma from someone’s previous misadventure at a very very nice hotel in Canada.
From a hotel guest who woke up for an early check out to find that he’d had another roommate and that he/she/it passed away on the bathroom tile over night. He/she/it leave a wife and 14,000 eggs in the coffee maker.
In the gray area between the toilet and the cabinet at a hotel near Laguardia.
A pube from a previous (shedding) guest at an airport hotel in Atlanta.
From a traveler at park ‘n stay airport hotel who glanced down and saw this at his feet while brushing his teeth.
A previous guest left, and housekeeping missed, a dirty and still damp wash cloth at a non-chain hotel in the Pacific Northwest.
From a flight attendant on layover in Odessa, where the seat was just sitting on the toilet bowl. Came right off. This is a new one.
Most likely coffee. But still, who wants to see that when they walk in?