Good point.
It all depends on what you’re used to and where you are. I used to be out until 2/3am when I was in downtown. In suburbs, where people are in bed by 6pm, obviously that time isn’t good. But then, where we live, it is quite ok on the main street, where I get off the bus from. My place is about a minute and a half away from the bus stop, on a residential street. And the area itself is pretty safe.
So, midnight once or twice a week sounds ok to me.