So the bad truth is that SL casinos are still operating, under the radar. I found abandoned land and was surprised to see six green dots on the map, contained within a plain (non-textured) prim pyramid. I entered and this is the sight I captured:
I asked how they got around the gambling ban. The avatar in purple (right) said: "You are wrong, nobody is gambling, this is a bible study group." I took another picture and the croupier said "Kick him, he's taking pics!" I was then attacked by the avatar in red on the table (subsequent AR filed) and had to leave because I was being hit by missiles. I also saw someone place a bet with a value of 25,000L.
Gambling goes on in SL and I think the Lindens must not give a damn.