There's a local cafeteria here, that serves really good food.
The owner is rude, but's that's a plus point - people come there as much for the quirkiness as they do for the food.
He (the owner) keeps a tin full of small pink candy at hand, which he dispenses instead of change when he's out of it.
And it's reached a stage, after many years, where people ask him to round off the bill by means of adding a couple of candies to the order. Every year, he has to up his requirements of the little pink candy.
It's never going to become a lead product, but it's a nice way to up sales just a little bit.
You got any pink candy?