Even San Francisco natives like me are sometimes alarmed by the pressure applied to denizens of this city to publicly acknowledge that we live in the best place on earth. That being said, we certainly do have access to the best of things here: The best intoxicants, stimulants, and ingredients; the top narcotics, robotics, and ... ice cream.
But, sometimes, you just want some coffee. And not necessarily the best coffee but lots of it all the same. And eggs. And hash browns. And lots of that, too. In short, you want a diner.