From: Latitude 40° 48' 43N Longtitude 74° 7' 29W
As someone who worked in the hospitality industry for over a decade, I can tell you with complete confidence that any assurances by the staff that the room is completely cleaned out are a knowing and complete lie. The housekeeping staff is made out of people, not robots, and people get lazy, distracted, tired, overworked, or inattentive, just like every other human being on the planet. The housekeeping staff is paid relatively low wages and experiences high turnover.
I've found crack pipes, condoms, food, weapons, drugs, pornography, body and other unknown fluids and substances, inside supposedly "vacant clean" rooms. Not hidden either, just right there under the bed, or another obvious place.