Review for Argosy Casino - Sioux City Review For Argosy Casino - Sioux City Google User Jul 23 '16 at 17:13 They rescheduled our room because of a flop in their registration. The blonde woman behind the counter had the worst attitude when we tried to explain the situation. She told us we had to leave, even though the man who checked us in the night before had us booked for two nights because that's what we told him. This is the second time we have had a registration screw up in two days in Sioux City, Iowa. View full site to comment or like