I feel like there are very few places that serve breakfast on weekdays in SF that aren't hotels or greasy-spoon joints (not that there's anything with either of those).
Had a great breakfast this morning at Bocadillos though; their main plates come with toast (which is accompanied with top-notch butter, some type of spicy sauce, sea salt, an jam), perfectly dressed mixed greens, eggs (perfectly poached) and patatas bravas (tasted great, although wouldn't have minded it being a bit more spicy. I had the catalan-style sausage hash as my main dish, and it was extremely tasty. Just a great low-key vibe too; friendly bartender, some people were in there to eat, some were just catching up over coffee.
Will definitely want to return for other meals.