Review for Diamond Jo Casino Dubuque Review For Tree Bar Google User Jul 1 '18 at 22:59 7-1-18 was our very first time coming to Diamond jo. As I expected with every casino ten thousand penny slots. That's how the casinos make their money. Anyway I enjoyed the progressive slots they had. I enjoyed the high limit section because it was not too big and I was able to locate the slot I wanted to play versus walking around for several minutes in a larger section. Me and my wife walk away with some winnings even on the first time there. We will come again. View full site to comment or like