I generally don't like large venues like this but they've got large screens everywhere for all to noticed that aren't close and their sound product is second to none.
The address is Piazza Trinita dei Monti 6, Spagna. http://Answers.Snogster.com/index.php?qa=152581&qa_1=bu-kad%C4%B1nlar-hakk%C4%B1nda-s%C3%B6yledikleri-cazibesi-nedir