km, you remind me of the fellow who went to a camping store and asked how many people could fit in that sleeping bag. "One big Irish cop, or two skinny hippies" the salesman said.
If you want privacy for couples and sex, you'll need a much bigger boat. If you plan to cruise and sail and just need a place to sleep at night...plenty of room. If the six of you can share a Winnebago, you'll be OK. If you really want privacy, check out hotels.