Ok, so who wants a bucket of used coffee grounds? Well, you might if you garden, because coffee grounds make excellent compost, especially if your ground is mildly (or atrociously) alkaline. Coffee grounds are good for worm beds, too. It stands to reason that the worms in your garden will like them just as much as the worms in a controlled worm bed. They'll put them to good use, making good dirt for your garden.