13102 Newport Ave
Tustin, CA 92780
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When you "Shooby-Dooby down to Ruby's" next be aware that the old-fashioned-style food chain has more than just hamburgers, shakes, and fries but also has a few Mexican items as well.
When I went to their Tustin location a couple weeks ago I tried their fish tacos. You can also get chicken, shrimp, veggie, or carnitas tacos, (The veggie tacos come on whole wheat tortillas and you can get a lo-carb version of the chicken soft tacos.) but you can't mix and match them. After ordering my tacos I wondered if I should've ordered a side dish to go with them but they were plenty filling. You get sour cream and guacamole on the side and a couple kinds of McIlhenny's Tabasco sauce to use to your liking. The fish had likely been frozen just prior to cooking but was flaky and flavorful enough to get me a good Mexican food fix at a non-Mexican place.
UPDATE: Here's a picture of when I got huevos rancheros at the Ruby's Moto-Diner at the Irvine Spectrum. Don't know why the picture turned out so bad.