When we were kids, the lady up the road always drove her kids to school in her dressing gown. My mother was mortified by it! Which is probably why I've never done it. Our school is only 500m up the road, so I figured it was safe to go that far in my pj's. The worst part of it was walking from the front door to the car, thankfullly no one drove past but I hope the neighbours didn't see me!