Metz is quite a safe town. Avoiding suburbs like Borny or St Eloy, and the old town small alleys, by night, is however recommended.
In the centre, some people are likely to ask you to give them â¬1 or 2, a cigarette or even a mobile phone call. These people are not beggars or poor, they're just lazy and feel like they can get what they want just by asking people. Don't be intimidated and feel free to say no. Some of them might tell you a dramatic story or offer you cards for "charity." Don't support this and tell them no.
Don't walk from Lafayette to Resam late at night.