Grape stomp workout

My latest idea is that a tony spa could make a mark for itself by offering guests the opportunity to crush wine grapes by foot (link broken). There's the aerobic benefit for starters, the way in which it encourages good balance (video unavailable, and the health effects of grape extract (link broken). I think videos of the spa experience would be a must.

Autumn harvest in an English vineyard,
originally uploaded by Fred Dawson.

Of couse, participants would have to be warned beforehand of the possible ill effects (link broken).