GearBits pointed out that Panera offers free WiFi access at a number of their bakery stores. I live in an area with a number of Panera locations, so I consulted at the Panera store locator to see if this is something I could try out. Panera's locator indicates which stores have WiFi installed.
Of the five locations within 50 miles of my home, only one, the Nassau Street location in Princeton offers WiFi. This is a relatively small, extremely busy location where my wife and I have often had difficulty finding a table during lunch. Others, including a very large restaurant in West Windsor which is ideally suited to people lingering and working there, don't currently have WiFi available. Does that make sense to you?