How Restaurants Use Mints To Make More Money
In this short presentation, the speaker describes a simple field experiment conducted in a restaurant to test how different ways of handing out complimentary mints affect server tips. Three distribution methods were compared: (1) giving each patron a single mint, which raised average tips by about 3%; (2) giving each patron two mints at once, which raised tips by roughly 14%; and (3) giving one mint, then later returning to give a second mint in a personalized, unexpected manner, which produced a 23% tip increase. The speaker links these results to three well‑known psychological levers: reciprocity (people feel compelled to return a favor), personalization (a tailored interaction feels more meaningful), and unexpectedness (surprise heightens the perceived value of the gesture). The talk concludes that businesses can replicate the effect by applying these principles—using small, free gifts delivered in a thoughtful, surprising way—to boost customer generosity and revenue.
