Although a little pricier than I'd prefer, I'm giving Welcome Diner 5 stars for the delicious locally-produced food, relaxed and friendly atmosphere, and the outgoing people who work there.
You know a restaurant has something good going when a college student is willing to pay $10 for a watermelon salad. Or $5 for french fries with an egg on top (seriously, you have to try it. So delicious.)
Welcome Diner has a unique operation--in the warm Arizona months, Welcome Diner operates from 5pm to midnight, and during the cool Arizona months, it's open for brunch and lunch. Whenever you happen to visit, you'll be greeted warmly, offered delicious food, and given a wonderful starry opportunity to enjoy the night (or morning) with dear friends.