To tenyearsafter: Back in 1977, the Hollywood Park Race Track (in Inglewood) was used for District Conventions. I, myself, was there. The Race Track was used once again, during the Summer of 1979, for District Conventions. I've heard that the H.P.R.T. has either been demolished, or soon will be. The property was sold, and it's about to be demolished, or probably has been. (I haven't driven by the Race Track in years.) I enjoyed it as a venue for District Conventions, though---it was right under the flight path of Los Angeles International Airport, and you could see huge jets, like Boeing 747s, or DC-10s, or Lockheed TriStars on Final Approach to the runways over there. It was neat to watch them.
A side-note, kind of off-topic, but I'll mention it anyway:
I believe that the Race Track was used in the Summer of 1976, also. I had brought a multi-band radio receiver, that picked up the aviation frequencies, with me, in my car to the convention. After the session was over, I was in the car, listening to Los Angeles Tower on that radio. There was one airliner, that had turned onto Final Approach, and the pilot asked the Tower Controller, if he knew what was happening at the Race Track, as there were all kinds of cars in the parking lot, people milling about, but with no horse-races going on. The Controller replied, with, "I don't know either, maybe they are showing some kind of movie over there." True story! It got a little bit of a laugh out of me, at the time. If only the pilot and the Tower Controller REALLY knew.....
Best Regards to Everyone