I have to go back 55 years . . .
so memory is a bit hazy but - GREENACRES was a hotel on Collins Avenue (main street) in Miami Beach, entire building painted green, of course. If the illegal card room of the same name was located in there somewhere.
Sunny Isles as a geographical area consisted of three or four peninsulas off Collins Avenue near North Miami Beach. Swampy forgotten patch of real estate. There was an old casino building on one of the isles, which was the RIVIERA ("R" chips). I don't think there was any other casino in the immediate area, so perhaps SUNNY ISLES was its former name under different (mob) ownership?