Now that you’ve conducted contextual inquiry, apply your data to a redesign of the coffee shop user experience.
Data like this is key to the design process. Now you have some idea of what works and what doesn’t work in the particular coffee shop you observed and you can start redesigning it.
What did you find out? Were the lines too long? The menu hard to understand? Did you observe customers getting lost, confused, impatient? What about the moments of delight, did you see any of those?
This is the data that will form the foundation of your redesign. Feel free to envision a new menu, new interior design, an app for pre-ordering, a clerk that meets customers at the door. Design anything you like as long as you can show how it improves on an existing problem.