Concert Venues in Dubuque, IA Five Flags Center - Theatre Where: 405 Main Street, Dubuque, Iowa - 52001 Events: 8 Mississippi Moon Bar - Diamond Jo Casino Where: 301 Bell Street, Dubuque, Iowa - 52001 Events: 7 Q Showroom at Q Casino and Hotel Where: 1855 Greyhound Park Rd., Dubuque, Iowa - 52001 Events: 3 Five Flags Center - Arena Where: 405 Main Street, Dubuque, Iowa - 52001 Events: 3