I know that cafes remained open in Paris during the occupation, but I've been able to learn precious little else on the subject. What about the rest of the country? How did rationing and curfews affect the operation of bars and restaurants? How were French citizens affected in their ability to patronize such establishments?
Have a look at the answers by /u/commiespaceinvader and /u/hellcatfighter I linked in this thread about the German occupation of France, which describe the effects of rationing on soldiers and civilians alike, including the operation of restaurants. More can always be written on this topic.