How about a buzzer?
Letters to the Editor
Having had two evening visits to our nice, up-to-date hospital emergency room, the first time I went there was no one to be seen, so I pulled the door open.
Now when the front door is locked for the night, there is a sign saying, please KNOCK, do not pull door open.
REALLY? Wouldn't you think that they could at least have a buzzer, like the old hospital?