Cafe Mustache has free wi-fi that shuts off at 6pm every evening, as well as coffee drinks, sandwiches, vegan chili, and a bar that starts serving in the evening. Very close to the California blue line.
This place is kind of weird, because it's a coffee shop and community space that also serve as a big huge advertisement for State Farm Insurance. That can be a little off-putting at first, but the coffee is great, the baristas are super nice, and there are almost always some great vegan options in the pastry case, frequently including vegan donuts from Fritz.
They go out of their way to make it friendly to the laptop-toting crowd, so if you want to work on your novel or your Ruby app or whatever, this is the place.