I find myself increasingly disconsolate. I have been singing (mezzo-baritone), as you know, in that five-man barbershop quartet, Ring-a-Lung-Dung, which interprets the works of overzealous German nationalist composer Richard Wagner (of “Ride of the Valkyries” fame) through hand-puppet mime performances. We routinely give our all, outfitted in “Scream” masks and tight beige leotards, to overemphasize …