It's Denny's. I've eaten at this one for many years, and through several changes in management, simply because it is conveniently located near my house. The restaraunt is laid out well, with two main wings (one of which used to be smoking back in the day) so things don't get to noisy, even if it is crowded.
Food is adequate for Denny's (their pancakes and sandwiches have always been pretty tasty) though the quality of the service tends to be a dice roll depending on if you get a new server or not. This location is generally kept clean so as long as you aren't expecting the world, it's a good place to hit when you want the sit down experience but don't have a lot of extra money to spend.