As a Small Business owner, you have to be crazy to let your mobile professionals use the Starbucks Free WiFi without using a low-cost VPN App on their Smartphone, Tablet or Laptop.
I’m not trying to pick on Starbucks (although it helped get your attention didn’t it?). This issue exists with most FREE WiFi services, including Airports, Restaurants, Cafes, McDonald’s, Starbucks, Hotels, etc. It’s a bigger concern when you travel overseas.
If you are wondering… A virtual private network (VPN) enables a Desktop, Laptop, Smartphone and Tablet to send and receive encrypted data across open public networks like WiFi. In many small businesses, VPN is more secure than their own private company WiFi network. Wikipedia has a more technical description of a VPN Network