I went to San Jose State for college. Across the street from campus, there was a little Mexican food joint situated in an old victorian home appropriately named La Victoria. It was always packed with students. I distinctly remember the first time walking in, since it was very peculiar that every single person had their very own unmarked bottle of orange hot sauce. Not only that, but almost every person would dab this sauce on their burrito before taking each bite. Needless to say, I tried it and was also hooked.
La Victoria is still around today! I believe the original location is still open but they've also opened a few more. Their sauce was so popular that people would steal it, so now they sell it! Luckily for me, the sauce is also vegan.
Definitely give "LaVic" a try!