A Smile table doesn’t have any straight edge.
As a result it doesn’t have any imposed geometry. Little about its structure dictates where you sit, or how the table interrelates to another, meaning you can create clusters of 2, 3, 4, 5 … however many you want, right up to a nice gentle horseshoe, or even (when it’s right to do so) a straight line with the teacher back at the front.
We never said it was always wrong. Merely that it wasn’t always right.