In 2005 Google wanted to do a nice gesture and offer free wifi across SF. The Board of Supervisors literally asked Google how much they were intending to pay the city in order to offer free wifi... SMH.
There are a few in SF. MonkeyBrains being a local-friendly top of mind name. Downside is the smallest vibrations, wind gusts, or rain often leads to service degradation.
And also Sonic.net crew representin', although bizarrely they are(were?) only north of Market street :-(
I also had mostly-good experiences with Google Fiber (née Webpass) coming to the condo building, although despite their name it came in via WISP on the roof. I could have thrown a rock and hit the Webpass building from my condo but ... at least it wasn't Comcast and the whole building got gigabit IPv6 service for what any one of the owners would have paid for it from Comcast. I bet our units being pre-wired for Ethernet made the situation easier, but depending on the size of the HOA I'd guess not insurmountable even if one had to pull cat6 later
