Bar della Pace
Rome's Antico Caffè della Pace (which is known to all and sundry as Bar della Pace) is eternally à la mode. In cooler months the antiques and flower-filled rooms emit a sense of warmth, and the proximity of the tables allows for cosying up to your neighbours. Outdoors, it continues to be a great, albeit pricey, place from which to survey passers-by. Of a summer evening pick a pavement table beneath this establishment's trademark façade clad in swaying ivy and watch the action on the street.
Sources and Copyrights: http://www.timeout.com/rome/restaurants-cafes/venue/1%3A6780/bar-della-pace