At check-in, you can request a room that does not have a lock-off.

At one time, my wife and I were in a non-Hilton property (it was one of the nicer Harris Rosen hotels..Rosen Centre? Rosen Plaza?)in Orlando. We had a PL stay and our room had a lock-off. There was a working woman ensconced in the adjacent room and everything was clearly audible.

I found the experience to be educational.

This is probably documented on another thread.