The hot spots differ by ship, but are identified in your Cruise Compass when you board. They are in areas like the library, the Centrum or Promenade, etc.
Rhapsody - W. Caribbean - 2004; Rhapsody - W. Caribbean - 2005; Sovereign - Bahamas - 2005; Enchantment - Canada/NE - 2005; Rhapsody - W. Caribbean - 2006: Vision - Alaska - 2006
Navigator - E. Caribbean - 11/2006
Vision - West Coast Repo - 4/2007
Grandeur - Canada/N.E. - 9/2007
Voyager of the Seas -"R"W. Caribbean - 1/2008