Best cruise line to cruise for teenager in my opinion RC Independant of the Sea, however, if on budget then Ocean Village as you can hire bikes to explore local on the bike.
As odd number of travellers, you'll need to have at least 2 rooms, unless you went for the penhouse suit.
Independence of the Seas - Royal Caribbean - have Family Ocean View rooms that sleep 6. 2 x twins, 1 set of bunks in curtained off secion and a double sofa bed. Very large rooms. You can only book these rooms through a travel agent though, not online.
RCI is the best line for teenagers and the young at heart. Do you really want to all be in one cabin - if so then yes there are family rooms that take 5. I would suggest 2 adjoining rooms = that means 2 bathroom.
Hi, we are a family of 5, 2 girls 16,15 and a boy of 13
we cruise with carnival cruise lines and have to book two cabins side by side which works quite well.