Ah, CJs. There's one literally a walking distance from where I live and it's often a nice place to go for late night munchies with great fast food for a reasonable price.
To OP:
The locals in SoCal usually say CJ when referring to Carl's Jr. I have known CJs ever since I had my memory and has been a local hangout for kids back then. Back when I was young (back in the 1980s), CJs had great kid meals which came with high quality die-cast metal toy cars. Don't see that often these days but man were those the times!! And the taste and quality of the burgers back then were still the best out of all the other chains.
Back when I was kid, the CEO and founder Carl's Karcher would always be on commercials alongside with his "Star" sidekick promoting his restaurant. Since I was a kid I didn't know any of his personal conservative views, but he certainly did a great job of keeping quality and taste as top priority in his restaurants.