The equivalent of swinging pet doors for denizens of the walls to make it easier for them to come out and gobble you while you're napping.IIRC for homes and I think would apply to hotel rooms within 6' along any wall - so every 12' - and on any wall section between doors or obstructions that is 2' or wider.
What bothers me is it seems every hotel in Mississippi - the plug, plate, and box all move 1/2" or 1" in and out of wall.
Toodleoo!
Ron Hebbard