From Unofficial Carnival Wiki

This program, like Camp Carnival, was created for these older teens (15 - 17 year olds) it was designed and dedicated to our guests in the specific age groups. The older teens get a chance to show off during a Karaoke session, pool parties, late night dances, outdoor sporting events like basketball and ping pong.

Many ships feature lounges which are dedicated to both age groups. Some of these lounges feature video monitors with Playstation 2 or X-Boxes, as well as comfortable seating. High energy dance floors with state of the art lighting and sound have also become a mainstay in many of our "Teen Only" lounges.