Inspirational 40++ Vacant Occupied Door Lock. Often used on restroom doors, a message on the outside of the door changes when the lock is engaged or disengaged. I tried using some of the door hardware i had i've had the black door with a brass vacant/engaged lock above on my pinterest 'bathroom' board for a while now, and i keep coming back to it. Vacant engaged brass lock bolt vintage style indicator bathroom toilet door art deco cinema occupied washroom restroom lavatory fitting room.