Is gambling OK? Don't bet it! There's not an easy or instantly obvious proof text answer to that question.
In my own perception gambling is not a sin its only an entertainment to refresh yourself,it is a kind of relaxiation in your mind to free from worry and recreation yourself awareness.the only sin if you gambling with cheat in your bet,or your behavior of how to handle in gambling by making debt even if you have no more money or asset,or maybe you betting all your properties to gain your loss and that is what we could a sin.