Isn't Freemasonry, the Knights of the Ku Klux Klan, The Knights of Columbus, the Veiled Prophet, all just similar social clubs? Obviously the KKK went ideologically rotten at some point but it started out in the same vein, yes?
I've never really done much homework on the secular(ish) clubs in America. But they sound a lot like Mormonism. I guess the difference is that Mormonism's founder claimed divine rights for himself and turned the social order into a cult of personality. Doesn't look like the other make such grandiose claims and are happy to be social orders and business circles.
I went to a Veiled Prophet debutante ball once. They parade all the teenage girls of members out in ball gowns to prostrate to the Veiled Prophet. It's a $300 a plate dinner in full tuxedo. My girlfriend was a debutante at the time. Her rich uncle was her member-escort, I was her +1.
*edit
I met a woman there who has been my archetype for 'holy-shit rich' ever since. She had a diamond on her necklace the size of a grape and she was telling us how she had a panic attack the other day because she missed her exit on the highway, didn't know what to do, pulled over, and called 911. Her father owned/owns one of the construction companies in the region that is capable of building stadiums and hospitals and bridges and shit.