The Gershwins Porgy & Bess at Regents Park Open Air Theatre Regents Park Open Air Theatre As dusk descends, plumes of smoke are just visible through the trees, escaping through the top-most leaves in excited wisps. Walking up the path, a gentle hum becomes a more discernible combination gentle chatter and laughter, punctuated by the occasional pop of a champagne cork. You might be forgiven for thinking that you’re approaching a secret, woodland gathering, shrouded in mystery – a pixie party, albeit with wine. In fact, it’s not that far from the truth, for this is the magic of the…