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I am one of the organizers for the Tesla Owners Club of Orange County... There are 4 Southern California official Tesla Owners Club and the Tesla Owners Club of Los Angeles (@DrComputer) is the "grand-parent" of them all and has been around forever, many of us owe a lot to them.
We have a group here on TMC, but all our sign-ups are easily found on our landing page at http://www.octeslaclub.com/ (it's rudimentary, I'm having too much fun in our cars...)
We also have a meetup next Sunday, January 12, 2020... Announcements on registered club sites... (Here on TMC or meetup...)