Hi! I am staying in Orient right now! Yellow Sub and Petite Casino are indeed gone. Further done the road on same side of street is a small grocery store I believe named Ocean Star. It served our needs for beer, water, Diet Coke, milk, eggs, bread, cheese and crackers! My husband even got frozen chicken breasts there to cook on the grill. Last night we were looking for Etna ice cream so we went to Hope Market which is down the main road toward Grand Case and Marigot. Not far at all. On left side of road. Much bigger selection (found our cookies and cream!).
As far as light lunch we have only eaten lunch at Bikini so far. Certainly an option!
Day 4 for us out of 17. Beautiful weather so far! Hope you have a great trip!