I've always had problems with double negative statements. I don't think it is a language thing because I also do it in my native language of Tagalog and Spanish is notorious when it comes to double negation. Even in computer programming languages where using negative conditions is considered a bad programming habit, I still have to sit down and draw a chart to clearly understand double negations when I encounter them.
As far as the busboy is concerned, he is far from being unfortunate looking, he could even be mistaken for an actor in a soap opera. I wanted to redeem myself that evening but that was the first and the last time I saw him. And the worst thing about this is, I was showing off to my friends!
I should go to therapy.
(The photo above is the hotel area in downtown San Francisco from the city's Mission district.)