Starbucks, is all I can say. As long as you get a coffee now and then they’re cool with it. Kinko’s is another option, if you don’t mind that they’re a bit run down and got quite bad chairs. Libraries, hm depends, they come in all sizes and shapes, some of them are really nice places to be, some of them not so much. I usually hang in a Starbucks in Barnes&Nobles, nice atmosphere.