Many retailers offer Wi-Fi to attract and retain customers. Now some retailers hope to get more from wireless networking via Social Wi-Fi, in which customers get free connectivity by logging in to the retailer’s network using their credentials from a social network account, such as Facebook. The user gets free wireless connectivity. The retailer gets access to customer data for marketing purposes. For example, the retailer could use the data to tailor offers to the customer, such as an in-store coupon for a favorite brand. … Social Wi-Fi