BATMAN IS UP AT ALL HOURS?

If you think about it, Batman has to be at board meetings and probably a 9 to 5ish thing during the day then fight crime at night. You can't do that without a lot of the brown dragon...and I guess the revenge/vengance factor to keep him afloat. There is no way he's getting 8 hours of sleep. Not that I get that, but I don't fight crime either. Or do I? I guess you will never know. It's the mystery factor that keeps you on your toes