Ibiza Casino (Link) opened it's doors a couple of years ago, it's just outside of Ibiza Town I think and its suppose to be pretty popular, although I have never been.

But apart from that, no Ibiza is not generally well known for its gambling, other than local pubs taking bets on the horses and stuff.

if you're going gambling be sure to take your passport.

btw bj, ibiza has had a casino for years - it's location at the moment is a temporary one whilst a five star hotel is being built on its former site.

It also has a really good restaurant for those that want to make a night of it.