I would say that $100 is my minimum amount to budget when visiting a casino. When playing withR$100, the only table game I would be interested in playing is roulette, and only if the bet isR$5 minimum or less. Only getting 10 spins at the table is not my idea of a good time.
Below are some of the high RTP slots you might want to try if you want to win at the casino withR$20: Mega Joker - 99% RTP. Blood Suckers - 98% RTP. Starmania - 97.87% RTP.