I've got the suit and I'm in blackwater so where the heck is this "high stakes club" ?
You should see the poker symbol on the map once you're wearing it if I remember right. It's just across from the hotel.
There are two poker tables in Blackwater. You want the one that isn't in the hotel where your safehouse is.
thanks found it. I gave myself a big slap on the forehead and said d'oh