It can be a challenge to establish a great place to work from in a city. I have managed to find really great places in faraway cities like Jerusalem, Bangkok or Seoul, where I can be comfortable working and going out to social events and return to safely. I also need to get great sleep and have food and coffee before I go out or simply work there. Fa's place is just that, the great place to operate from in San Francisco.
I highly recommend Fa's place, which is secure, extremely clean, comfortable and quiet. It is one street off the main thoroughfare (19th) and away from traffic noise. It is a regular neighborhood in an extremely good location for everything. The kitchen is sunny and well stocked, very easy to have coffee or a meal right there. The room was sunny, extremely clean, very good linens, strong wifi, tv, nice bathroom.
Other nice features were the guests I met who have been regulars there, which speaks very well to how great it is. I had coffee in the sunny kitchen and enjoyed watching parents walk children to the little pre-school across the street.
For a single traveler needing to have convenience and true quiet, this is it!