AZ have very helpfully posted a map showing all the lounge locations at FCO - I found this useful as it can be a slightly confusing airport for layout and am adding it here, along with the URL, for the assistance of others.

The "E" gates are non-Schengen; "D" is Schengen. Piazza Navona and Young Lounge are landside, the others airside.

Map is here


FCO AZ Lounge Locations