Today in the XXI Century we have TV programs that tell the stories of the famous and powerful, but, is this new?, not at all, gossip and liars have always been, traditionally, places where friends of this "sport" use to meet, were called "gossip place" in spanish "mentideros", a well placed public places, where the lies were running before the news.
Meeting point you have it marked on the map below in Orient Square in front of the Royal Palace:
Old houses of the Princess of Eboli.
Lujanes tower. Exterior.
Conde de Miranda Square.
Main Square. Marizápalos balcony.
"Mentidero" steps of San Felipe. Puerta del Sol Square
1 hour and 30 minutes to 2 hours depending on the group.