Jean-Louis Trintignant, Stefania Sandrelli etc), meet regularly.
During the parties, they drink, eat and have vivid and stereotypical discussions that Scola caught, without pity, in his entourage.
It is again on a terrace that, thirty-five years after, Jep Gambardella (Toni Servillo), the main character of the recent Paolo Sorrentino's "La Grande Bellezza", will meet the companions of a new roman Dolce Vita where the terrace is no more a café on the Via Veneto, like in the sixties of last century, but a private house.
When you walk in the centre of Rome, You just have to look up and you'll see, amongst the roofs, a lot of beautiful "hanging gardens". Most of them are private properties: the rich Romans live often in apartments and not in houses, but the terrace is a "must".
If you don' know any rich Roman where to have a diner party with the view on the Colosseum, like in "La Grande Bellezza", don't worry: All the famous hotels of Rome have a roof garden restaurant and bar.
A lot of other hotels have also a roof restaurant with a panoramic view: Hotel Hasller (above the Spanish Steps), Hotel Minerva (near the Pantheon), Hotel Forum (with a view on the Imperial Forums), the Bernini- Bristol (Piazza Barberini)...and so many others!
From Trastevere (starting to climb from the viccolo del Cedro, near Santa Maria in Trastevere), for example, you can have a walk to the Janiculum hill. Or, on the Aventine hill, to the "Orange Garden" (just next from the famous key hole of the "Knights of Malta" with a view on Saint Peter) that has a belvedere with a magnificent view.
If you prefer to do something easier, you can just walk to the Pincio (Villa Borghese), above the Spanish steps and discover at your feet, from the terrace of the Pincio, the huge and beautiful Piazza del Popolo. And if you go down, on the Piazza, you can have a rest in one of the two historical café-terrace: Canova or Rosati.