Based on your definition, a "black belt club" must be a long term contract, and any long term contract is open for debate.
But, what if you take the same program, cover the same material, but charge on a month by month basis? Without the stigma of being forced to pay for the training if you don't want to, then the training on it's own is where the value comes in. Is that training worth paying for on a month by month basis?
PS? Where's the devils advocate hat?