Why are conversations limited to about four people?
I've always preferred groups of 2-6 people. Many board games are made for groups of this size.On one side, humans can mentally cope with 4-6 objects at most - as though we have 4-6 memory slots, which is reasonable given that we have 4 limbs.On another side, network effects of nodes on a grid become unmanageable above about 6 nodes - a group of 6 people will have 36 one-on-one interpersonal relationships to manage.