Good espresso in San Francisco chain coffee shop

It exists! Peets Coffee & Tea makes regular, non-flavoured, espresso based coffee. Still no flat white, but the espresso and Capacino is good.

As a good companion, the (badly spelt) SpecialtysDirect.com is a fine bakery on the corner of Bush and Market. Their Thai chicken sandwich is good although their rendition of a ciabata roll tastes rather bagel-like! I haven't tried their online ordering system yet.