Wouldn't imagine any of them will get any time so long as they don't have previous form. Would think it will likely be a huge asset seizure, with the threat of prison if they don't cough up. It wouldn't surprise me though if those in court were just fronting the business for some other dubious characters.
Bearing in mind previous court sentences for similar crimes have resulted in custodial sentences, I would not be surprised if the 3 main owners of the business end up doing time.
They weren't fronting it for anyone else, Sandy started it, even working the rooms in the very early stages, and it seemed a family business.
Definition of money laundering from wikipedia :-
Money laundering is the process of transforming the profits of crime and corruption into ostensibly "legitimate" assets.
Everybody else in court will have colluded in the removal of large amounts of cash from what is basically an illegal business, and avoiding the taxman in the process.