■ Ian and Vivienne von Memerty, pictured, will explore some of the great showbiz partnerships in Synergy at Theatre on the Bay until Sunday July 30. In the show, the duo perform the glamour of the Gershwin Brothers, the effervescent joy of the Sherman Brothers, the show-business sizzle of Kander and Ebb, the musical magic of Lennon and McCartney, the sophisticated drama of Desiree and Frederick in Sondheim and Wheeler’s A Little Night Music, and the laughter-filled poignancy of Tevye and Golde in Bock and Harnick’s Fiddler on the Roof. Tickets cost from R100. Book through Computicket.