When I see "San Francisco", it is not unreasonable for me to assume you are only talking about San Francisco.
If you were to refer to the surrounding areas of Oakland and San Jose as San Francisco, you would potentially upset those residents.
https://en.wikipedia.org/wiki/San_Francisco_Bay_Area
When I see "San Francisco", it is not unreasonable for me to assume you are only talking about San Francisco.
If you were to refer to the surrounding areas of Oakland and San Jose as San Francisco, you would potentially upset those residents.
https://en.wikipedia.org/wiki/San_Francisco_Bay_Area