As far as I know, there are no public casinos in Saudi Arabian cities but it's apparently hugely popular among the local UAE wealthy so maybe you saw images of that.
(or maybe as someone above said, they are located in another arab country.)
This is what I am waiting for clarification from genuine Arabs, I'm sure Google is not entirely correct, as far as I know Arabs have certain laws in the world of gambling, Moslem.
Just to make sure, that pictures, youtube and so on about gambling in arab countries are lies and misleading.
It's time to close the discussion topic on Arab gambling, that's a lie.