I can suggest you to play dice game. It maybe simple but there is a possibility for you to earn bitcoin this things only. Then while you play the games you will enjoy it while you are accumulating your winning satoshi here.
It's the simplest gambling game but to win with it is the hardest, the results are random. And it is also depending to casino you are gambling, like those provably fair casino's they are good to to test your luck and make an easy profit with it. But for those games that needs times, knowledge and bigger capital, we can't win to it easily.