We had about eight CLOSED signs; two in front of the register, three on the ice-cream display, three more in front of the espresso machine. People still came and asked us if we were closed.
When I worked at a bar our urinal stopped flushing, so I put the laminated "Out of Order" sign over the bowl. We had a lot of customers walk out of the bathroom with a line of piss on their pants from the splash back from pissing on the sign.