Since I have done this before with teenagers! I would try the pass at the AI , there are some good places for adults, like Travellors, Seastar, (hotels) The Jungle, club, there will also be other parties like Ultra Violet at Negril Escape, but in my experience the teens don't fit or will be board at all these places. The best time the kids had in Negril on New Year's Eve was at Seashore Bay, AI?!