Review for Diamond Jo Casino Dubuque Review For Tree Bar Google User Jan 31 '19 at 22:00 I visit the Diamond Jo several times a month for work and for recreation and I always have an amazing experience. At work events everything looks wonderful, tastes delicious and have wonderful staff. For personal visits, usually concerts, I enjoy the different types of events offered and the ambiance. Great place to visit in Dubuque! View full site to comment or like