If you're John Belushi in the movie Animal House, you're likely piling plate after plate onto your cafeteria tray, only to throw out half of it away when you drop your tray on the conveyor belt after you're done. The reality is tray service can be quite costly for many reasons, and moving away from it will require more than just ditching the trays. But before we get into how to adapt tray-less cafeteria service, it's first important to understand why it can be beneficial from both financial and logistical standpoints.
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