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Whenever search 'upstairs cafe' in the internet, there will be up to thousands results appeared. It proved how fast the development of upstairs cafe is. These cafes usually located in Mong Kok, Wan Chai and Causeway bay, mainly because those place always crowded with people and a good place for gathering. Another reason is that there are quite many old buildings situated in those areas. Of course, this phenomenan have both advantages and disadvantages. For advantages, they provide a lot of choice for people to choose from. For disadvantages, they lead to competition and saturation. On one hand, some people may claimed that competiton will lead to improvement so called 'positive competition'. On the other hand, they established a barrier on the entry of the market for the new businessmen, even lead to monopoly i.e. negative competition. Nevertheless, they can not argue with it. The only thing they can do is propaganda and promotion. It is so called 'Survival of the fittest'. However, how to solve the problem of saturation? Propably we can discuss it in the next topics.