Designers of chairs often consider the amount of space that their creations take up, in addition to the priority of ergonomics. Interestingly, the Chair 53 by Chris Jackson has been thought up with a different issue in mind: what features will make it easier to set it aside?
Take a close look at the cafe chair and you'll notice that the front sides of the two front legs have been subtly beveled. The resultant angled surfaces make the empty object more stable when it's tilted towards the table. Crumbs fall off of the seat and the cleaners have better access to the floor.
You'll also notice a handle along the back of the Chair 53's flat seat. This makes it more convenient to pick up and upend when such restaurant furniture must be flipped and placed on the tabletops after close.