I would still argue that - for now - they are still mostly minority cultures. An alternative, minority interest lends itself to the creation of a whole sub-culture. Adherents band together, almost in defensiveness (?) and create a whole lifestyle around their liking of Morris dance, or D&D, or whatever. The more mainstream the interest is, the less likely it is to be more than a sort of mini-sub-culture that you enter for a few hours a week - e.g. when you go to your weekly choir practice, or knitting class, or whatever - before returning to your properly scheduled mainstream life.

Intrigued by the dog seers, though...