Carlos Cabana, head of equity sales and trading at CastleOak, dubs the room a “diversity pool,” because the participants are all minority-operated brokerage firms. While in this instance CastleOak doesn’t know specifically who is on the other side of every trade, it knows it will be one of about 10 counterparties who meet certain eligibility criteria related to ownership and investment goals.
I am convinced that they only added this bit to make sure people would argue about skin color and ignore the implications of the rich making sure the peasants aren't allowed to play the same game as them.