Is gambling OK? Don't bet it! There's not an easy or instantly obvious proof text answer to that question.
Interesting question

. For my own opinion, gambling is ok, as long as you don't have any wrong doings or you don't harm other person. It is never a sin. Some people are doing gambling just for their leisure time or just hobby only.
Gambling is a bad thing because people in the eager of more become too much attached with it that they dont care about the harms this thing is bringing to their social life and it completely destroys the inner peace of the gambler as well.
Also, the society is not willing to accept these gamblers due to their bad impression on society. Gambling brings the gambler to the point where there is no way left beside suicide.