I have been going here for a few years. It’s not closed, they shifted their business to a membership model and dropped the arrive and drive fun karts. I this place. Oxnard, CA.
I can only speak for the LA area as I have never traveled up north for racing…
Adams has been around for decades with their school following suit. Recently they have updated their website and started offering group classes, but will charge a hefty price for one day of driver coaching. And on top of that, you are not one on one with an instructor.
At Calspeed, I know they offer coaching for their rental fleet, but I’m not sure if they are currently doing competition kart driver coaching. The last few years they offered a Calspeed Karting team, where they offered arrive and drive programs, but they have since discontinued this.
What most new drivers do and what I would recommend is contacting local teams who offer one on one driver coaching. These teams charge a reasonable fee and you get driving tips as well as going over the data in between sessions.
Message me if you’re interested, I can get you setup with one of the local teams.