All I can find is the Grand Casino in Baden.
There is not one in Zurich?
If I wanted to go, I'm not sure how to get to Baden on the train from where I will be, near Hallenstadion.
I'll have one free day in Zurich, which is unfortunately a Sunday, so visiting the churches is out and I like visiting foreign casinos when I travel...Kind of like collecting casinos in countries.
At least Geneva has Movenpick near the airport. (not a bad casino, by the way)