When I was very new to the lifestyle maybe 19 or so, I was spanking a friend from college at a motel and in the early stages of the spanking when she was just getting vocal we had a knock on our hotel door that sent us scrambling, her to cover up and me to answer the door. It was the lady from the front desk who stated that although she was sure that the spanking was well deserved, we should try covering up the noise with the TV. She even suggested the Spanish tv channel because that has shows with a lot of yelling in them.
For reference this motel room had a nice living room area with tables and chairs and a couch and then a back bedroom area. We were doing the spanking in the front living room area because the light from the window reflected nicely on her bare bottom (I was young as I said). We quickly realized that doing it in the bedroom area provided more sound cover.
There is a follow up to this story, a few weeks later we went back to the same motel and the same lady was at the front desk. She smiled when she saw us and she assigned us the room at the far end, away from anyone else. It wasn't busy so there was nobody within 6 or 7 rooms of us.