surprise surprise
We have stayed at the Marquis before,as you cannot beat location and the rooms and service have certainly been above average. We stayed two nights this weekend, and when we checked it the room seemed in a bit of disorder. Although it was not "dirty," there were pillow cases rolled up on the dresser and I was not convinced that the room was actually turned over completely for new guests.
The second night was a bit more troubling, as we hear loud voices of multiple adults from the room next door at 345am. About an hour later, when things seemed to have quieted......a young naked lady entered our room through the doors that joined the two rooms-----presumed to be locked, obviously an error! My wife greeted her with "hi"-----she said "oh my god" and quickly left through the door she entered. We presume she was looking for the bathroom in her own room, and might have been a bit impaired from partying the night.
Hotel management was contacted that morning, mostly to suggest they make sure adjoining room doors are locked up by the housekeepers when strangers are using such rooms---they seemed disinterested, telling us to wait in our room for a manager---a manager who never came to the room. 
Very interesting.