True - 5 and a half (we have a tandem).
Late 90's Cannondale R600
Mid 90's Specialized Rockhopper (don't have the heart to sell it, but lightly ridden)
2006 Trek 520
Year Unknown (probably 05) Surly Cross Check
2006 Bike Friday

1996 Santana Visa Tandem

TPBM is headed on a vacation sometime this year that will involve biking