Review for Diamond Jo Casino Northwood Review For Diamond Jo Casino Northwood Google User Mar 28 '16 at 1:25 Staff was rude and unhelpful. They mocked me because I tried to cash in an expired chip. How was I supposed to know they expired? Eitherway I don't see their advantage losing a customer over a $5 chip. It wasn't really about the chip but the principle. I'll take my play to the casino's closer to the cities. Not worth my time to play here. View full site to comment or like