Here’s an interesting device (~ $600). It’s a wireless router that enables you to run a public WiFi connection as well as a private network. I’m sure most coffee shops can just use a normal wireless router (~ $50), however for the occasional time when you want to separate your business computers from your public WiFi access this could be handy. I’ve written before about why I think it makes more sense to offer WiFi for free. It quite simply attracts customers. There are arguments for charging for access though — like if you have high demand or want to keep tables open.