text:  We actually thought about installing a giant disco ball over it. This is where the robots live, or dance, I guess. They look like those Roomba vacuums, but maybe four times the size. Big, flat discs scooting under towering stacks of blue bins. The robots whisk them over to packing stations on the other side of the dance floor. And we like to call that because they'll actually spin as well, and it kind of looks like they're dancing.