These are 2 places I used to go to when attending OSU in 70s.
Max's was a downtown restaurant-Gay or Broad St. that had some good sandwiches.
Warren's was this tiny sandwich shop (seated 10-12) that was open only overnight and was run by Warren Gardener. It was on High St, a few miles north of campus.
They're both gone as far as I can tell. Anybody remember these places.