Try singing! Take heart, spoil yourself, sing along: "Singing Guests" with prominent Swiss tenor Christoph Homberger (www.dieproduktion.com), a pillar of many Marthaler productions such as the Waldhaus play, and classical pianist Jan Czajkowski. Five days, 10 a.m.-12 noon and 4-5.30 p.m., and a public recital at the end.