I can't stand Denny's! My youngest son had explosive dia...never mind -- bad story about a cross country trip and having to stop every 100 miles to find a Walmart and buy underwear.
So, this is a great place for breakfast, even for us late risers. Sure, a couple of the waitresses are brain damaged, but the food is good and you get a frequent diner card with every sixth or tenth meal free. I have two full cards but haven't had a chance to see what the free breakfast includes and which waitress they give me.
The Scottsdale location has a mellow collection of conservative republicans and the "Snottsdale crowd" but ignore them and park the dirtiest, most beat up car you can borrow (or have, in my case) next to a Bentley or Mercedes (make sure at least three hubcaps are removed from your vehicle). Then exit the car and walk like you're drunk. Walk behind the other persons car and look at the side. Then shrug and stumble into the restaurant. You can be sure you've perplexed and worried a diner who has watched the entire episode.
Fun and good food! What else is there in life?