It’s a place where people meet to network and make connections - and most people have never set foot in one. These exclusive establishments, in cities around the world, are reportedly more popular than ever. So what goes on behind those hallowed doors? And how can people get in?We look at the history of these exclusive clubs, find out how to join, and ask whether they have a future. If you would like to get in touch with the show, please email: businessdaily@bbc.co.ukProduced and presented by Elizabeth Hotson(Image: Members of the Harvard Club use the lounge to read and socialise in 2022, in the midtown neighborhood of New York City. Credit: Getty Images)