No "Summer Walk" on the Prima, that I can recall. However, Deck 8 has Zone names:
Forward is La Terrazza. The glass viewing walkway is called Ocean Walk. In the center area you'll find either The Drop Zone (Port side), or The Rush Zone (Starboard side), which are then followed by Infinity Beach heading toward the aft. So many names for what we, otherwise, know as the promenade deck. It certainly has some large sculptures and nice plants!