We use these in a classroom to maximize the amount of seating. They provide just enough table space for 3 students at each table, and they are sturdy, lightweight and easy to move around. We have found that it enables us to have everyone facing the front of the room, but also allows flexibility to form a U shape for discussions. The table legs are out of the way.
This table is narrow enough that it would not work well to have people sitting across from one another, but it is perfect for our purposes.