Gambling is illegal in Iran, but there are luxurious underground casinos fully equipped for card games. Interestingly, many famous athletes, artists, and even politicians—who publicly condemn gambling—can often be seen in these underground venues.
Without those big names being involved or having something to do with that place, it will be hard for an ordinary citizen without any government backup to pull off something like that, knowing the implications if they are caught, and if somehow they get exposed and the officials who are not part of the deal for getting that underground gambling running happen to notice, the place will be shut down, and it will be hard for the owner of the place to be tracked down.
Extremely wealthy people are the ones usually capable of running these underground businesses and when you are rich, you have connections which is why you would often see politicians or celebrities go here. People are hypocrites and you would see one’s true self when they have money and the capability to buy or avail anything they desire.