Five between my wife and I (but not nearly enough). I guess I will let you decide on the ownership details.
A forty or more year old Sears given to my wife so that she could ride around Milford, NH. Not really co-owned, I guess.
Two 38 pound BT City Flash city bikes built by Gazelle. New less than a year ago, and what got me passionate about this stuff.
Two custom built Vittorio road bikes - our "real" bikes.
So many bikes, so little time.