Cafeterias in LA?

My kids were watching some movie over the weekend, and one of the scenes had the family having lunch at an old school cafeteria, where you grab a tray and grab the food you want on the food line, and pay at the end. They asked me to take them to a cafeteria too, so they could experience that type of restaurant setting. Of course, I can't think of any, other than Clifton's (RIP?) and Ikea (which is sort of a cafeteria setup).

We're in the SFV. Any cafeterias I could take my 9yo and 11yo to for lunch? I don't mind driving over the hill, but I'm not going to drive to Tustin or anything that far. :)