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Restaurant servers read academic studies of customer behavior with the enthusiasm of graduate students (which, of course, they often are.) That's because we're always eager to adopt a new technique that's guaranteed to produce bigger tips, whether it's putting a flower in our hair or using our guests' names.
But a new study out of three universities in the U.S. and Canada is unlikely to provoke much response from even the most scientifically-minded servers. According to the research, restaurant goers who are monitoring their waistlines will order more food from fat waitresses. The study suggests the best way to up a check total – and accompanying tip – is to put on weight.