Yes, there are such hotels. For example, Pestana Bay 4 *, Enotel Lido 5 *, some hotels offer optional RO (without food, as a rule (breakfast), HB (half board) and all inclusive

But I recommend hotels with breakfasts (in Portugal, food in restaurants is more diverse and more profitable than meals at the hotel), cafes and restaurants here at every turn . In addition, many hotels have mini-kitchens, it is always easy to warm up food, even cook. And in supermarkets there are a lot of semi-finished products, many different delicious ingredients for sandwiches, salads, lots of fruits and wine - a huge choice at extremely favorable prices.