Some diners only look old-fashioned. This one is the real deal from the 1940s, with red leatherette swivel stools and booths with minijukeboxes. It does famous all-American breakfasts and some Mexican specialties like machaca with eggs and cheese, and it's not above panini and croque monsieur sandwiches. For dessert: mile-high pie from the counter.
Clayton's Coffee Shop
Top choice in San Diego