My high school didn't have a cafeteria, so you either brown-bagged lunch, ate off campus if you had a car, or ate microwaved Stewart Sandwiches from the canteen. These were universally acknowledged to be awful, but they had a strange fascination, and we ate them anyway even as we joked about them. I for one, never could tell the difference between the Stewart "Steak Sandwich" and the Stewart "Hamburger".
The company was apparently originally called Stewart In-Fra-Red Commissary of Minnesota and their slogan was the dubious "Sold Almost Everywhere". After my encounter with them in the 1970s, they bought a couple of other companies, changed their name to Stewart Foods, Inc. then merged with Blevins Concession Supply, Co. and changed their name to Stewart Blevins, Inc.. That was in 1992, and I can't seem to find them after that.
Anyway, I was driving around off of Huger Street in the 1980s, and came across their local office. It was something of a revelation as in my mind, Stewart Sandwiches more appeared than were made and distributed on purpose!. The place now appears to be yet another barbecue restaurant: The Palmetto Pig. It may well be a great place, but while the location seems reasonable to me for a food distribution operation, I think it would be a bad place for a restaurant.
UPDATE 1 June 2011: Commenter Andy says this was Shealy's Sandwiches, not Stewart, and that Shealy moved here from the Assembly Street location (now TakoSushi).
Well, I'll try to verify that it was never a Stewart in old City Directories when I get a chance, but in the meantime, I'm leaving all the Stewart's memories here. (Similarly to what I had to do when I screwed up Krystal..)