Here's one for you - do you remember the Taco Shack on First? Hole in the wall place.
No I do not. In high school we considered the lake to be the dividing line of most places we hung out at, so South Austin is much more familiar.
Later on, I worked during college at 7th and Colorado, and ate at a lot of lunch places downtown, but not the Taco Shack.
Since we are quizzing on hole-in-the-walls, am sure you have been to the Hoffbrau, were they (still) make steaks with lard on the flattop.