We used to hang out at Svoboda's in the late 1960s and one of the
clever gags was a statue of a man in the women's rest room, with
nothing on but a fig leaf at the typical strategic location.  If the
fig leaf was lifted by a curious visitor, it would sound a siren and
turn on floodlights aimed at the outside of the rest room -- and they
would stay on until the victim opened the door, to be greeted by
cheers from the entire place!

Dave McMaster