I've written about Denny's before, and about how I am not a big fan, though I confess I've had my share of 2AM suppers at various locations over the years after insane work schedules. I knew about the old Two Notch Denny's, the one that used to be on Airport Boulevard, and the Denny's "Diner" that is still on Harbison Boulevard, but I didn't know about this place at all.
Wilson Boulevard is what North Main Street is called after it gets close to crossing over I-20, and as it happened, I had some business in the area recently and noticed this closed restaurant as I was driving by. The shape of the sign suggested a Denny's, and sure enough a quick google verified that. I don't have a closing date, but it can't have been too many years ago. On the surface, the I-20 location, near to a truck stop, and with lots of parking seems like it could have supported a restaurant. I don't ever recall seeing a sign from the highway though. Perhaps they didn't advertise well enough, or perhaps people don't want to eat at Denny's unless they have to, and the interstate corridor through Columbia has a number of better alternatives.