twice in a hotel, first, while relaxing someone knocked to deliver food, said I didn't order, then kept going back and forth until I got to the receptionist's phone, even though I already said I didn't order, then second, while taking a shower, someone knocked on the door without asking permission + like banging, when I came out there was no one, it was really disturbing, even if they were checking the room, the hotel employee should know which rooms are occupied or not, so they don't just knock, then the bath water had black dirt :(