Royal Caribbean's Mariner of the Seas was the last of their "Voyager" class to hit the waves, in 2003. It's very much a "family friendly" cruise ship, with an above-average number of things for kids to do, including computer areas, craft spots, video arcades and more. Teens have their own nightclub and their own outdoor area, "The Back Deck". Not that there isn't plenty to do for adults, with everything from dance lessons to rock-climbing.
Some Mariner of the Seas ship facts:
Inaugural cruise in: 2003
Maximum number of passengers: 3835
Number of pools: 3
Number of dining rooms: 6
Number of bars and lounges: 8
Cruisers on Mariner of the Seas have five dining rooms to choose from, plus a cafe and a bunch of places to grab snacks of various types. The ship's "specialty" restaurants are "Chops" (steaks, etc) and "Portofino" (you guessed it, Italian fare). "Vintages" is a wine bar that has more of a wine cellar vibe than a "bar on a cruise ship" vibe.
The main place to see or be seen on Mariner of the Seas is the indoor Promenade that runs about half the length of the ship. Based on Deck 5, it's five decks tall and lined with lounges, pubs and shops (shall we stop at Ben & Jerry's today or maybe the champagne bar?)