A man was sitting next to the machine, at one of the cafe’s wooden tables, and he was holding a sign that read: “Don’t Pay Transaction Fees.” This very human entrepreneur, you see, was undercutting the world’s first bitcoin ATM. As people walked in to use the machine — which was charging a 7 percent transaction fee — he offered to exchange their money, by hand, at a lower rate.

http://www.wired.com/wiredenterprise/2014/01/bitcoin_atm/