The grocery chain, franprix, has outlets every few blocks. Most of them also have machines to make fresh-squeezed orange juice which seems to be very popular among the french.
We discovered that one of the nearby franprix also has a great breakfast deal. A bottle of fresh-squeeze orange juice and a croissant, pain au chocolat, or other pastry for 2 euros. Given this is France, the grocery store pastries are really good. Did I mention it is a less than 5 minute walk from our permanent apartment? I expect we will be getting plenty of Vitamin C this year!