Transition Snoqualmie Valley will explore a local barter exchange program at its “Potluck with a Purpose,” 6:30 p.m. Friday, Dec. 3, at the Carnation Tree Farm Loft.

Visitors can meet Francis Ayley of Fourth Corner Exchange and learn about a complementary currency option in its fourth year of operation. Ayley, features in the documentary “The Money Fix” will talk about his Life Dollars barter program

To learn more, e-mail to launchpath@gmail.com or visit www.fourthcornerexchange.com.