We always used RINOs where we could find a disaffected but otherwise popular Democrat to run in a district where there was an overwhelming Democrat majority.
That's one of the ways we broke the back of the Democrats in the Souf'.
The Country Clubbers are simply the higher income middle-class and young rich guys who do party work. Remember, the Democrats make use of their special interests to toss up "leidership" to use in the party structure itself. Ordinarily Democrats don't simply cut the rich people into the party structure ~ as Bloomberg can tell you, it doesn't matter how much money you've got, they don't respect you in the morning unless you've served on the Planned Parenthood board, been a kneecap breaker in the union, or taught gradeschool.
Actually, here in the South people started turning Republican because the Democommies became social liberals. The country clubbers are a lot like the NC GOP for the last century- just go along, get along, and take permanent minority status, unless the Democrats become so corrupt that it becomes impossible to leave them in power- which is finally what happened in Nov. In my book, such people might as well be Democommies.