The one millionth visitor was greeted at the Rivers Casino Portsmouth in Virginia in a remarkably short amount of time. Less than six months have passed since Rivers Casino Portsmouth first opened, but according to company representatives, business has been booming since then. There are 81 tables games, 1,400 slot machines, and a BetRivers Sportsbook at the casino. Although the Virginia casino business is still in its infancy, Rivers has dominated it since its inception in late January.