A few years ago I heard a story of the famous JE "Johnnie" Johnson whilst CO of Cottesmore during the V-Force era.
A group of airmen had been caught by the Snowdrops running a card school in one of the barrack blocks. They were eventually wheeled in front of JEJ for dispensation of punishment.
Johnnie, liking a bit of a gamble himself, tells these fellas to number off, left-to-right, 1 to 20ish. They all look a bit puzzled, but follow orders.
He then says "Even numbers dismissed. Odd numbers - a week of jankers"
Probably apocryphal, but I liked the story.