Heck no! Are you crazy??? Maybe for a short ride at a brisk pace but not for a normal ride.

I rode without a helmet a couple times when I started out but now I always wear one. Whenever I see anyone riding without a helmet I think they must be idiots and not smart riders (no offense to anyone). They're usually the ones riding with no shirt on too. No shirt, riding the wrong way, riding on the sidewalk, running red lights. THat's usually the guys I see with no helmet. No helmet, no brain.