Three years ago, in the now sadly discontinued Bar-jeder-Vernunft series ‘Wünschen’ (Wishes), an illustrious circle of guests was treated to a sparkling a cappella performance by gay host Erik Leuthäuser and his former Weimar singing teacher Michael Schiefel (now at the Jazzinstiut Berlin). Now there is a new opportunity to enjoy the loop-savvy vocal virtuosos as a duo.