I'm in Canada and when I worked at a casino doing some overnight moves. The guy I was working with a Czech who said he has worked worked in Graz, Nice, Paris, Monaco, Barcelona.

We had a break for lunch at 3am and of course almost nothing was open at that time. He was shocked there were no small cafes to pick up a fresh croissant or sandwich. He said especially in France cafes are on every corner and open early (although maybe not 3am).