I don't know about 4 teenage girls. YIKES. But we just got back from a cruise and we had Hubby, me our 15 yr old, our 12 yr. old and our 5 year old. A wee bit cramped but we only slept there.
Carnival Fantasy 6/05
RCCL Sovereign of the Seas 4/07
RCCL Navigator 12/07
RCCL Navigator 11/08
RCCL Liberty 7/4/09