There are some in the office I work in.
I used to ride a bike but basically just got too frightened by the number of people who pull out in font of you - "sorry, I didn't see you" - even when you're driving down the middle of the lane with headlight on.
Plus I had this girlfriend once who was a speech therapist in rehab, and she said that she never really succeeded in teaching the brain damaged bikers to talk again after their accidents, and this was a bit off-putting.
So I got rid of the bike.