700 South Hathaway
Banning, CA 92220
If an attempt at getting the "Most People Playing PINBALL Simultaneously" doesn't grab you, there's going to be a huge amount of old arcade games to play.
It's not that close to LA, Banning, but, it's technically in Southern California. Enjoy three days of pinball and arcade games, 750+ they claim on the site. The only other attraction will be Movie Nights, showing off docs on old-school games.
Here's the full list of all the games that will be there.