Ok, if you're willing to suspend your disbelief, or quest for authenticity, you should check this place out.
It's the highest quality fast food I've ever had. There's nothing extremely unique on the menu, though they do have fish tacos. Everything was very fresh. They offer a salsa bar for condiments, which featured maybe 6 different salsas as well as chopped onion, jalapeno and fresh cilantro.
It's franchised, with only one in Manhattan by the Empire State Building. The woman behind the counter acted very proprietary, helpful and very friendly. They bring your food out to your table so you don't have to stand waiting.
Granted, it's still hard to keep this mixed metaphor together. The influence is much more Hawaiian than Mexican, although all items were typical fast food Mexican items.
Pretty cheap, too. Very clean. And very tasty, whatever you care to consider it. I had the daily special enchilada/taco combo. The enchilada sauce was not particularly homemade, but everything was very fresh. The taco shell was fresh, the lettuce tasted like iceberg, not like a fast food plastic bag. The ground taco meat was very juicy and flavorful. Not spicy, though. I guess that's what the salsa bar is for.
Just don't try to figure out the decor. Gazing at surfboards hung on paneled walls while eating tacos may actually be considered authentic in the California or Hawaiian sense of the food.
Anyway, for fast food, it's a find. I just don't get down to that area much and there are no others.