and the 3rd point of the triangle was the "Famous Pioneer Club".

We've got a glass showing the 3 of 'em.

Fuller's Index shows Frank Schivo's California Club as 1964-1970.

Fuller's shows the downtown Barbary Coast as 3-1-66 to 5-30-66. (no owner listed)

Fuller's shows the Famous Pioneer as 6-29-67 to 1983. (no owner listed)

Another Fuller's listing for the Pioneer Club, that covers 1966 is:

New Pioneer Club [Agron, et al.] 7-24-58 to 6-28-67