In my opinion, this is the central place on the ship. The gathering place.

Deck 5, The Plaza

Here is some stuff that is on Deck 5

• Beauty Salon
  • Extra money
• Gelato
  • Extra money
• Good Spirits at sea
  • Extra money
• Guest Services
• International Café
  • My favorite place
• Internet Café
• Lotus Spa
  • Extra Money
• Sabatini’s Italian Trattoria
  • Extra Money
• Santorini Dining Room
• Shore Excursions Desk
  • Extra Money
• The Enclave
  • Extra Money
• The Piazza
• The Salty Dog Gastropub
  • Extra Money
• The shops of Princess
  • Extra Money
• Treatment Rooms
  • Extra Money

Gathering Place

This is where things happen on the ship. They have entertainment in The Piazza. Some pretty good acts.  An international café is a place I like to visit.

They also have public bathrooms here as well. 

Deck plans

Video

You can exit and board the ship here in some ports.