"housekeeping"
Used an expiring rewards certificate and spent a very nice weekend in philly. 
The room was nice, but one whole side of the hotel was covered with a tarp. Evidently making some improvements, but no issues on the weekend.
No complaints until housekeeping knocked on the door sunday morning at 9:15. "What time will you be checking out?" 
This is a hotel with a 12:00 check out time.
The room was clean, everything worked, but housekeeping was an irritant.