It seems to me that such "schools" are possible only if you are a member of a club and do it professionally, then you may well be taught some lessons by more experienced players as part of the transfer of experience, so to speak.
That's what I think also, that you'll just be able to enter such school if you're part of an exclusive club. I don't think publicly that the government will allow and give permission for a school that's only going to focus with gambling. Because in general, that doesn't sound good for most and there will be many rolling eyes with the idea.
Thus, everything that's related to gambling. You'll hear that people are mostly negative about it and they can't think of any other thing but only addiction specially those that look at the other picture of it.
It's funny for me to hear when a "successful" trader recruits students to teach them how to trade, for money, and it's funny to me because I don't believe that a person who knows how to make money on trading will teach someone this for money. The same will apply to gambling, if you want, then there will be smart people who will take money from you and share their wisdom, but you will not get any sense from these lessons, just give your money to this "teacher". 
Watch Kaiji, it's a anime about gambling which says the same thing, which is: Experience and street intelligence is more relevant in gambling.
