“It feels like we’ve gone back in time!” my friend shouts in my ear over the blaring techno remix. Instead of our usual stomping grounds of Hackney, Peckham or Tottenham, we’re spending our Saturday night in — god forbid — a postcode that starts with WC. Specifically, we are standing in what used to be the Odeon cinema on Shaftesbury Avenue, which for the past six months has been transformed into a nightclub called Lost.