Casinos in Berlin and Hamburg?

[newb99]

Could be off to Berlin soon. Any recommendations for a pleasant evening's gaming in one of the casinos there?

Hamburg may also jump onto the itinery. A quick search of the 'net reveals there are four casinos in town. One of them is close to the R'Bahn, but as Mrs N will be with me I don't won't to end up somewhere that's used as a meeting place for the local working girls and their guests. Again, recommendations please.

Thanks.