Resist the temptation to contribute to the play’s dialogue, no matter how tempting it might be. When Dame Judi Dench, in her 20s, was playing Juliet in Romeo And Juliet at the Old Vic, her parents attended every show. One night when the young actress cried out the line, ‘Where are my mother and father, Nurse?’ her father answered back from the stalls, ‘Here we are, darling, in Row H.’ At the same theatre, while Joe Stilgoe was playing the piano during an in-the-round production of High Society, a member of the audience wandered up to his keyboard and introduced himself. ‘Hello Joe, I’m an old friend of your father’s.’ ‘Very nice to meet you,’ said Joe, ‘but you must be mistaken. This is the 1950s and I am an American jazz musician.’