TOMMY, I have to respectfully disagree.
Ken Sprague was the Santa Monica Gold's Gym owner, and as far as I can recall ... he had nothing to do with the Venice location.
By that time he and his wife had relocated up north a bit to the Seattle area.
Sprague owned the original Venice location from 1972 to 1979 and certainly owned it during the Pumping Iron era according to this interview with Rick.
He converted into his family home for a while thereafter.