Came across some good images of street food vendors.
They give a pretty good feel.
I really like the image "food12.JPG", 1st image, 5th row; nice restaurant!
The little poster, in a couple photos, is telling vendors to keep things above 60cm, one of the "green star" standards.
I can't recall ever seeing a "green star"!
If you navigate around a bit, he also has hundreds of photos of Bangkok.
I think he spends a little too much time around Patpong!