You're asking about "Cruisin the Beach" at Broadway at the Beach:
http://surfboardpromotion.com/index.php ... -the-beachCar shows are held here several times a year at various locations. It's free to walk around, admire the old cars and talk to the owners who are usually nearby. These events always come complete with vendors selling all sorts of food and other items. It doesn't matter which day you choose to go, as it is the same cars and vendors every day.
I just clicked on the link above for "2014 show pics" which does not seem to be working, so here area few photos I took last fall:
http://www.funbeaches.com/car-show-8-30/