It might seem an odd choice, but after reading Jon Savage’s new book, I think if I had a time machine I’d now be tempted to set its controls for 13 January 1966 and the annual dinner of the New York Society for Clinical Psychiatry. Andy Warhol had been booked to give a speech, but instead he put on a gig by the Velvet Underground and Nico at full uncompromising blast, with a couple of Factory favourites dancing alongside them.