I think a new PH rule should be put in to force...If ever a post looks slightly dodgy it should be quoted in replies, not giving the chance for the OP to delete
Excellent choice of show! I've been twice now, though being a director of two companies I can only fit in so much culture. I can see the sense in you asking as it is a theatre after all. Jeans and T- Shirt with a light jacket would be best. HTH.