 Cafe owner Wu Zhengyan says that while the growth has been breakneck of late, an appreciation of coffee has been building here for years, and that she's getting customers of all ages in her place called Dou. In Shanghai, school students are being influenced by their parents and drinking coffee. Some grannies send their kids to school and then also pop in for coffee. We asked one of her customers how many cups of coffee she normally drinks every day.