Walking through the grounds of the Invalides, we found a few cool "sporting" events going on. First was rollerblade dancing. Not that big of a deal, except when you consider they did their moves along a straight line of 20+ tiny cones. I filmed a little Quicktime movie of this, available here... (I don't do YouTube...).
Further along, we found old guys playing with their metal balls. Not sure what they call this, a French variation on bocce ball, but there were several groups of older men playing this... and they were very good. I especially liked the little chains with magnets that picked up the balls so the old guys didn't have to bend over.