As far as I know, these are Colorado casinos that are currently open.

Black Diamond CrCr
Black Hawk Station BH
Brass Ass CrCr
Bronco Billy's CrCr
Buffalo Billy's CrCr
Bull Durham BH
Bull Pen BH
Bullwhacker's BH
Canyon BH
Central Palace CnCt
Colo. Central Station BH
COlorado Grande CrCr
Creekers CrCr
Doc Holiday's CnCt
Dostal Alley CnCt
Double Eagle CrCr
Easy Street CnCt
Eureka BH
Famous Bonanza CnCt
Fitzgerald's BH
Gilpin BH
Gold Digger's CrCr
Gold Rush CrCr
Golden Gates BH
Harvey's CnCt
Imperial CrCr
Isle of Capri BH
Jazz Alley BH
Johnny Nolons CrCr
JP McGills CrCr
Lodge BH
Midnight Rose CrCr
Otto's (until tomorrow) BH
Palace CrCr
Red Dolly BH
Rich Man BH
Riviera BH
Sky Ute IN
Tollgate CnCt
Uncle Sam's CrCr
Ute Mountain IN
Virgin Mule CrCr
Wild Card BH
Womack's Legends CrCr

I think I got'em all!
Bob