There is no standard, the key depends on how big your total area is, how big you want to be, and whether there is a bathroom in it. Generally speaking, the small one is about10m2. Put down a table for eight people with a place to hang clothes next to it, and then just sit down, not crowded. The medium-sized table is about15m2, and the configuration of other tables is 12, which is similar to that of a small room. The big table is at least 20~25, 12 has a TV, and then decide the configuration of the small room! If the hotel you are staying in is superior and the small room has a TV, the area will be different. Even a large room has two tables for 10, so it will be bigger. The main thing to pay attention to is that you won't feel crowded after sitting down, and there should be enough space.