when you have a party on land, and it is dominated mainly by the male species, we call it a sausage fest.
but when the party is on a watercraft, and there is a distinct lack of the female species, then it becomes a banana boat.
DOUG: "hey, how was lake havasu spring break? you see a lot of hotties?"
FRED: "you would think so, but i think its getting played out. it was mostly banana boats out there..."