Let's think different. In general terms gambling is not totally right, but in fact according to other people says gambling is fine till you are not hurting anyone, or your getting addicted into it. but for me gambling is not really good to become a habit, even you do this for fun or entertainment it is wrong. Gambling is wrong for some, but not all.
It's very simple mate, if you think gambling is wrong then don't violate your principle as there are other things who can make you happy aside from this risky game. I gambled because I am a risk taker and I fully understand the risk and won't be blaming anybody for my loses, with that attitude you will not feel gambling is wrong.