Geeze you guys are tough. I bought a 25' that is rated to sleep 5 (this was back in 1969 when everyone smoked and weighed 110 lbs). I know that in today's reality that's really more like 4 people.
For the OP's stated purpose of weekend cruising with 2 teens, the 26' would have worked. Not to mention, as one of the other posters stated, the teens aren't likely to come out every time, especially when they see the amount of work involved, like loading, stowing, mooring, clean-up afterwards, etc, to say nothing of the work required to actually operate the boat.