In my career I've caught 5 patients smoking marijuana in the hospital, roughly 2 years apart from each other.
For reasons I don't understand, all 5 times they were in the same telemetry room.
There is nothing special about this room. It's a generic room on the 7th floor, facing the nurses station, but no more or less so than any other room. Different nurses have come and gone. But patients keep smoking weed in there.
Room 7310 is truly one of the great mysteries of the universe.