LA STAGE INSIDER
Music Theatre International (MRI) brings tuners to your iPhone and Salome Jens portrays Hadassah co-founder Henrietta Szold.  Street rock tuner, The Playground, returns to LA while Idol finalist Syesha Mercado joins Upright Cabaret.  Set design master John Iacovelli discusses craft and INSIDER peruses checkered history of the Music Box theater on Hollywood Blvd., aka the Henry Fonda Theatre, aka.…