Can't remember the last time I ate at a Denny's or IHOP.
I hate IHOP (fuk'n commie yuppie hangout with way overpriced food which is mostly not that good) but I had Denny's breakfast in San Antonio a few months back.
Nothing wrong with Denny's, as long as you don't mind the sometimes sketchy clientele.
That would be Waffle House with the scary clientele regardless of the time of day. And goes for their help, too.
I've never been but have always been curious to try one.
Closest one to you may be in Bethlehem. You need to try it next year at CF.
Although I've never been, there seem to be many better choices to go with. Perhaps I'm influenced by their reputation. We always do a Taylor ham, egg, and cheese sandwich in the car on our way to CF. Immediately followed by our first cigar of the day.