@hingehead,
Hmmm. I don't know about that club but I used to live in Venice (CA). The original Gold's Gym is there, and Arnold's office used to be - and still might be - in a building either just up Main Street in Santa Monica or just down Main Street in Venice, i.e., not far from the gym. Santa Monica's Muscle Beach is a little further up the beach (Main St. parallels the beach) - I didn't hang out there so I don't know if many of the muscle types were also Gold's Gym users. Thus, I'll easily guess there could have been a Hercules club around there in Venice too.
Good searching there, Hinge. Thanks for the hint on how.