Purchases make Wi-Fi free for limited time: An interesting approach by a UK chain of sandwich shops — a purchase gives you free Wi-Fi hot spot time.
Thinking about the customer can enhance loyalty. This is the opposite of the starbucks/t-mobile approach.
When they make a purchase, customers will be given an access code that allows them to log into the wireless network for up to 30 minutes, letting them check email and surf the Web while they’re away from the office.