I'm running 5

2 commuters
The Frankenbike-'87 Schwin World that I shortened the frame 2" and built-up more cross/touring
The Truck-'94 Raleigh M60, used to tow the kids/dog and foul-weather commuter

2 road
'03 Fuji Club
90s Shogun Saumari

and for plain fun
'02 Stumpjumper FSRxc