Table: 1 prim
Chairs: 2 prims each
When you place the table in world, it will automatically set out four chairs around it and place them into position.
When someone sits in the last available chair, a new chair will be added, and all the chairs will shift around the table to maintain even spacing. A maximum of 12 chairs can be set out.
As people leave the table, it reduces the number of chairs out to a minimum of four.