Southern Ontario is full of private ski clubs. It surprises me that this concept hasn't caught on in the rest of the world. If you can afford it, why not? It's no different than golf.
Now, the "advantage" tickets that let you cut into line at regular resorts - that bugs me. But then again, you can pull this just by buying a private lesson. And at places like Whistler, you can pay for a "Ski Esprit" package that sort of a group skiing package with lessons that gives you priority in the lift line.