Having not been on the PG prior to this cruise, I can only guess that these 'wings' are what was added during the last dry dock. These of course are on deck 8, and the small shade area on 9 next to the bar that is not used is still available as well.

http://www.kodakgallery.com/I.jsp?c=887dkyp.6or3l0zt&x=0&y=-sh8r73

Steve