Memphis, Shaftesbury Theatre
It's throwback week on the West End, with two very different shows recalling the darkest days of America's racial disharmony. But whereas The Scottsboro Boys shocks and satirises and has us choke on our own laughter, Memphis is content to be the feel-good flipside. Throw a few home truths and some grit into the mix - disturbing but not too real - keep it predictable and sentimental, even a little patronising, and you…