Years ago when I was teaching Face Reading (Personology) in Bellevue/Seattle, I'd take my students to the Sea-Tac Airport to watch people. That was in the days when you could actually go into the passenger waiting area.
We'd approach a passenger who looked like he or she was going to have a long wait for the next flight, and tell them we were on a field trip to study faces and could we read theirs....we always got a yes - usually with a big smile.
Maybe the class here in Grand Junction, Colorado could go out to the Mesa Mall and find likely folks lounging in front of Penney's, Herbergers, and other stores.
Sure makes for some great adventures!