Carry out 2 sessions (2 hours each in length) of ethnographic observation (i.e. participant observation, emphasis on observation here)

Carry out 2 sessions (2 hours each in length) of ethnographic observation (i.e. participant observation, emphasis on observation here)
In a public setting (i.e. coffee shop, park, ski hill, library, food court at the mall, etc.)
Write field notes of your observations.