Having visited parts of North Africa and the Middle East before, we know how common it is to see people spend a whole evening at an outdoor cafe table and only buy one mint tea all night, but here in Cairo there is another custom which has taken us by surprise: bringing your own food. Friends or families will occupy a cafe table all evening, order minimal coffee, tea or even just water, while tucking in to a bagful of food they’ve brought in from the bakers or from a takeaway, or even had delivered by courier to their table. How do these coffee houses make any money!? And as…