I have Comcast Xfinity at home in San Francisco. But at many of the coffee shops I go to I can use Xfinity, their city-wide solution for their customers. Ofte

I have Comcast Xfinity at home in San Francisco. But at many of the coffee shops I go to I can use Xfinity, their city-wide solution for their customers. Often times I don't even need to ask for the coffeeshop's wifi password since the Xfinity connection may be good enough. Quite often it isn't, more often than not actually. But the main shop I go to near my apartment it's reliable.