You can play everyone's favorite party game, "Which Bush spewed all over the owl's dick?"
Founded in 1872, the Bohemian Grove club started out as a social occasion for relatively harmless newspapermen and artists, like Mark Twain. However, many of their members were ambitious, and grew mighty. The club's gatherings went on, their power increased, and by the 1930s, Bohemian Grove had become an exclusive haunt of the rich and famous. By the 1980s, the club had 2,300 members, including influential senators, businessmen, and highly-placed U.S. government officials. Its waiting list for membership was 33 years long.
While business-making is discouraged -- the club straight-up tells its members that "Weaving Spiders Come Not Here" -- it happens all the time, because of course it does. Some of the most influential deals in history have been made in Bohemian Grove encampments. Such as, oh, the initial planning for the Manhattan Project. Yeah, you have the 1942 Bohemian Grove meeting to thank for the freaking nuclear bomb.
Not a Hogwarts set prop from Harry Potter.
This isn't some huge secret, by the way. Outside visitors aren't allowed, but no one denies it goes on. People who have managed to sneak into the party say it has a distinctively frat vibe. The world's most powerful men have a right to urinate wherever they desire, so mix that with the inevitable beer-drinking, and you get a lot of rich drunk dudes peeing against the base of towering redwoods. Which they then worship as a part of their traditional druidic rituals, in which they wear costumes and burn an effigy they call "care" in front of that huge concrete owl. Oh, and the owl is wired for sound, so it talks. News anchor Walter Cronkite did the voice for a while.