Not good, because you may not pass a few levels. If it is held in the dormitory, your roommates will probably disagree. Because if you open a shop, people coming and going will affect them. If you run an empty dormitory, don't say that there are generally no empty dormitories in universities. If there are, they will generally be used for other purposes and won't let you occupy the store. What's more, you may not pass the boarding pass. Open an online shop at most.