Yes, even middle school students can. My friend is a teacher in Nanning No.26 Middle School. I often go to see him after school at noon and afternoon, and find there are six tea shops on a short street next to the school. And a leisure cup of 6-7 yuan (oversized, it should be 700CC). Every tea shop owner pushes different drinks, which is very popular. Students and teachers are holding drinks while eating. I believe that as long as you can create your own unique style, you don't have to worry about sales. Of course, we should also learn business philosophy. Wish you success!