Pie a la mode

"Close the shutters!" screamed the bellhop, "everybody scream!" Circuitous misdirection, you see. There was no one outside, nothing to be seen inside. It was an unannounced game of Simon Says. A game the bellhop was scarily good at. Over half of the guests unwittingly lost went they raced to close the shutters and the rest were out when they began to scream. There are only so many shutters in the hotel.