For three months every summer, stingy but smart 20- and 30-something couples pack a picnic and a bottle of wine and head to White Rock Lake for the free concert series, Cool Thursdays. Actually, the series is not exactly free and it takes place at the Dallas Arboretum, but you can hear the bands just fine on the freeloading side of the fence right next to White Rock Lake. Typically, it's quite the scene. Perhaps there's some sort of honor-among-thieves camaraderie going on, but the moochers seem more eager to strike up a friendly conversation with complete strangers than the stuffy customers who see nothing wrong with spending the $14 ticket price on an Eagles cover band and other like-minded acts. Adding to the festive atmosphere of the free concert seats, sailboats from the nearby marina drop by to hear a song or two before floating away into the sunset.