It's Ball Season in Vienna and one of the most popular celebrities at the balls is Prof. Thomas Shäfer-Elmayer, whose family has been teaching dance and etiquette since 1919. He invites ball-goers to dance with the announcement, "Alles Walzer!" (All waltz!). Evidently he is also asking all to sort and recycle their discards. Vienna is such a civilized city; even recycling is done with grand class.