If the goal of stacked seating is to minimize space displaced within the stack, you really cannot make a more compact arrangement than this – one chair that hides two more in plain sight.

French designer Paul Menand created this seamless Triplette Chair series to work as one without making the combination unusable (as is often the case with stacks of chairs before you pull them apart).

Instead of storing them out of view, you can use the main space-saving configuration most of the time then simply slot out a few additional seating spaces on demand.