Not unless you count Hemingway's. Fuel and Fuddle has been there since the mid-90s but I don't know if that counts.
There are some other restaurants that have been around for awhile, but I wouldn't say they were multi-generational traditional hangouts.
I tell you though, I think you could have devoted a small corner of that restaurant space, maybe just a takeout window, to just dish out "O" fries, and maybe some hotdogs, and make some decent money. I wish someone would have been able to do that to keep the tradition and name alive. Seems a hell of a lot better than subleasing to a franchised stripmall sub chain that no one wants.