Admittedly owning 4 bikes is a lot, but each has their purpose! One I use for polo. The other I lend out to friends so they can ride with me. My main bike I ride for personal use and commuting. And my 4th bike is the ******* tandem which I rarely ride.
The thing about my commuter is that it has an Aerospoke and I am pretty sure people would laugh me out of the velodrome if I showed up rockin it, despite its merits for street riding. I suppose I could just change wheels though.
Hmmm ... Macbook Pro IS tempting ...