Suggestions, emotions influence tips

Posted: August 27, 2017 at 2:26 a.m.

At a cafe in Upstate New York, a waiter paused for a moment in the kitchen to draw a playing card from a shuffled deck before bringing a check out to a table of diners. If the card he drew was red, the waiter would give every diner at the table a high-quality chocolate in foil wrapping paper along with their bill. However, if the playing card he drew was black, the bill would come out chocolate-free.

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