@tsarstepan,
I ate at Denny's well, once.
I landed in Seattle on the way to Idaho for my aunt's memorial and Piffka and Jeanne d'seattle (I forget her screen names) met me as the plane landed and we tried to find the nearest place and it was Dennys. My omelet was good, and I'm a picky egg person - and the conversation was good, connecting.
My own decrying is about the small family coffeeshops being overrun by brutallist (how is it not?) corporatism.
On my trips back and forth from south and north in California, I strongly avoided 5 , whatever roads I travelled. 5 was too damned depressing.