I can't say I can identify with City bankers and their stress levels as I do these kind of activities as my job! I am lucky enough to be a presenter for an experience sharing website called Tellallmyfriends.com . It is designed to bring more fun into life and inspire peole to try out all this crazy stuff! My stress levels are pretty low and I would seriously encourage everyone to experience these activities!
Check it out:
http://www.tellallmyfriends.com