People who matter will recognize Burger Time. Everyone else is a loser.
(Problem with that one is all the characters were designed for a black background and I doubt they make too many black bibs)
Also, I was just going to do this same thing on an apron. I know I've seen another one but I can't find it right now (thought it was a Flickr contact). Okay, but "just do" I mean I put it on one of my many idea lists so who knows when I'll get to it.
I think it'd work fine without the flames at all.
Oh, two more words:
Panic Restaurant.