Not so flexible friend.

Visa are one of the sponsors of the Olympics, so guess what?  You will not be able to pay for goods or services inside any of the Olympic sites with any other sort of card, and you will not be able to withdraw cash from ATMs inside venues except with a Visa card.  The selfishness of these sponsors is getting more extreme by the day. I've got a Visa card and feel very inclined to cut it up in protest - except that that would simply be a case of cutting off my nose to spite my face.