I don’t know if this story is true but…
Some lady had an unlicensed playgroup in her house. One day a neighbor snitched and called the cops.
When the patrols started pulling up she sat them all around the table, gave them cardboard hats, yanked a cake out of the freezer (stored there for this purpose) and threw in some candles.
When the cops knocked on the door she lit the candles and started singing “Happy Birthday”.