How Does the Royal Family Handle the Receiving Lines- STRAIGHT GIN!!!

From Laura Bush's new book

“The royal family is not without its quirks. When Prince Charles and Camilla, Duchess of Cornwall, came to visit us, they requested glasses of ice before we began a long receiving line. The staff dutifully produced them, and the prince removed a flask from his pocket and added to each a small splash of what I presume was straight gin, so that they might be fortified before the hour of shaking hands.” (p. 296)