A draughtsman’s tale?
On following a water pipe into a darkened basement of a large factory I stumbled across a  hidden door behind some obsolete machinery. I was taking pipe measurements in order to draw up a plan of the factory water system.
As the pipe went behind the door I pushed it open to the shriek of ‘Wooow boy! I  thought you were gaffer!’ In the room were about half a dozen men, a dartboard, some cans of beer, crisps, music and general merriment which suddenly hushed on my entry.
I was given a drink and a cheese roll and went off quietly on my way!