Well, see that’s the thing. I don’t even like Starbuck’s. I think they are over-priced and pretentious. But that aside, the big reason I don’t like them is that they take business away from places that you might call the "Roadfood of coffee vendors". Here in San Francisco, anyway, every neighborhood and, in some neighborhoods, every block has an independent cafe’ selling everything Starbuck’s sells and more but with a lot more personality and a lot more friendliness. In such places, you can buy a latte or a mocha or an espresso or just a cup of "regular coffee" (usually from a local roaster and decent but you can avoid it if you don’t like the stuff) and, if you wish, a pastry (in fact, a whole "European-style" breakfast–or not if you just want coffee) and sit and read or work on a computer project for a few hours and nobody will bother you. Here, anyway, they function as alternative living rooms for people forced into having a roomate by the high cost of housing and most people have a favorite or two.
Here’s a list and map of places offering free Wi-Fi most of which are neighborhood cafes: http://california.metrofreefi.com/city/San+Francisco.htm . There are also many more that don’t have that. Here’s another list that includes many without Wi-Fi: http://www.graffiks.com/sf/coffee.html
Here’s the picture of Cafe Trieste, among the best known but not really the best, of the breed (but it looks typical):