Does standing for five hours count as exercise?

Therese and I have standing room tickets to U2 this evening, and from what I hear it's a long show, especially if you take in the opening band.  PLUS, all the close parking lots are sold out and it's over a mile to the cash lots, so we'll have hours of standing combined with a couple miles of walking.  Oh, don't forget shivering to keep warm.  I hear that burns calories as well...