A new coin-op vending machine has been designed to give Internet access via a WiFi access point. After you insert your coins, the timer controlled machine will enable a network port for you to access the internet.
The TT-1-WA is an integrated Wireless 802.11b compliant access point with coin controller. It includes password display function to give customers temporary access.
This would be a perfect solution for places who wish to charge for WiFi, although it is generally free in many locations.