In word racer, I've seen sign on the table "greens only", how do you do it?

Question

In word racer, I've seen sign on the table "greens only", how do you do it?

Answer 1

Greens only is referring to the color of square beside a user's rating. It means that only players with a green square beside their rating are allowed to play at that table.

Answer 2

To use that option you have to be a paid member of yahoo's all star league.