This is the relevant reference from the Books where Disks is mentioned.
I make no pronouncements on these matters, but report them as I find them.
Arrive at your own conclusions.
I wish you well,
Too often, I suspected, a suspicion of cheating at stones or disks, or a dispute over a slave, might lead to the flash of steel, the sudden movement of a knife.
Savages of Gor Book 17 Page 103