A bakery (or baker's shop) is an establishment which produces and sells flour-based food baked in an oven such as bread, cakes, pastries and pies. Some retail bakeries are also cafés, serving coffee and tea to customers who wish to consume the baked goods on the premises. Many other bakery shops provide services for special occasions such as weddings, birthday parties, or even business affairs. Bakery shops can provide a wide range of cakes designs such as sheet cakes, layer cakes, tiered cakes, and wedding cakes. While grocery stores and supermarkets in many countries now carry prepackaged, pre-sliced bread and cakes, or offer in store baking and basic cake decoration, some people may prefer to get their baked goods from a specialist baker's shop, either out of tradition, for the availability of a greater variety of baked goods, or from a perception of a possible higher quality practice of the trade of baking.