Primanti started it, I believe, but many,many local pizza/sub shops do it as well. And frankly, I don't like the bread Primanti uses. It makes their sandwiches very unweildy. I just prefer a sub. And a plate or at least a styrofoam box. Not a sheet of wax paper or whatever.
"For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring." - Carl Sagan