An unofficial tradition among junior officers of the USS Enterprise, a checklist of mildly forbidden stunts around the ship which Una Chin-Riley and La'an Noonien-Singh decide to try for themselves.
Enterprise Bingo is a secret game passed among the ship's ensigns. Each square on the list is a small dare that bends regulations, and the final and most prized task is to sign the scorch, a blackened piece of original hull plating that has never been replaced.
The game appears in the Strange New Worlds episode Spock Amok. During shore leave, Una and La'an catch two ensigns in the act and learn that the crew think of them as the place where fun goes to die. Puzzled, they work through the list themselves.
After trying several of the dares without seeing the appeal, they end by signing the scorch on the outside of the hull, protected only by a force field, and find themselves enjoying the view.