Several cities are offering free Wi-Fi service to residents and visitors. In California, downtown areas of Long Beach, Hermosa Beach, and Culver City have free Wi-Fi. Austin, Cleveland, and Spokane have Wi-Fi zones, and Philadelphia is building a Wi-Fi system for the entire city. Panera, like Schlotzsky’s Deli, Krystal restaurants and other independent cafes, libraries, parks and a growing number of cities, offer free wireless Internet access. No strings attached. The trend marks a major change from well-publicized efforts by companies such as Starbucks, Barnes & Noble, and FedEx Kinko’s as well as many hotel chains. They offer Internet “hot spots” at many locations for a fee ranging from $4 to $10 a day.