The only place I can speak to first hand is Paris. I go relatively often, and there isn't one part of it that is unsafe to walk in by male or female, day or evening. My last trip, some time after that Fox News apology, I stayed in a hotel on the edge of one of the supposed 'no-go zones.' No problem whatsoever. Those articles are alarmist crap, written by a professional anti-muslim propagandist, in one case.