Go to 2 different Starbucks. Try not to order anything. Take note of the activity around you. Describe the customers. What do they look like? Are they alone or with others? If alone, what are they doing? What are they not doing? If they are conversing, what are they talking about? Have you met any of them before? If so, under what circumstances? If there is music playing, jot down an excerpt of the lyrics. Do you notice any differences between 1 Starbucks and another?
Report your findings as a a comment.