If you like, you can purchase additional Gold Coins, but Sweeps Coins can never be purchased. There are two types of coins that you can use to play games for free at Chumba Casino: Gold Coins and Sweeps Coins. Unlike real-money online casinos, social casinos operate using a sweepstakes model. Available in most states (Washington and Michigan being the exceptions), it lets users play online casino-style games totally free of charge. Chumba CasinoĬhumba Casino is one of the most popular social casinos in the US. We go over bonuses, games available, payment methods, and more. Take a look at our review of Chumba Casino in this video.