Jeff Strank of LetMyPeopleGo organizes popular gatherings for Jewish singles in several cities. The annual Christmas Eve ball in New York City attracts more than 3,000 people. Contact through the website.

Spark Networks in Beverly Hills, Calif., owns online singles services, including JDate for Jewish singles, CatholicMingle.com, ChristianMingle.com and LDSMingle.com. In its 2007 trends reports, Spark Networks said it is seeing a rise in offline events connected to its dating sites and an increased subscriber base of single parents.

Peter Levine is the Lincoln Filene Professor of Citizenship & Public Affairs in Tufts University’s Jonathan Tisch College of Citizenship and Public Service and director of the Center for Information and Research on Civic Learning and Engagement (CIRCLE)  which studies young Americans’ civic engagement. He is also the author of The Future of Democracy: Developing […]

Pam Kanaly and Shelley Pulliam are co-founders of Arise Ministries, a nonprofit, nondenominational women’s ministry based in Edmond, Okla., that holds annual conference retreats for single mothers.

David King is a senior lecturer in public policy at Harvard University in Cambridge, Mass.

Bike & Brunch is a Jewish, largely single bicycling group in the Baltimore-Washington, D.C., region.

J.J. Adler directed the 2007 documentary Unattached, about single Orthodox Jews in New York City. Watch the trailer.

Neil Clark Warren, a psychologist and former dean at Fuller Theological Seminary, co-founded and chairs the eHarmony online dating service. He has written several books about relationships, including Date … or Soul Mate?: How to Know if Someone Is Worth Pursuing in Two Dates or Less.

Christian Piatt is the co-author of MySpace to Sacred Space: God for a New Generation (2007) along with his wife Rev. Amy Piatt. He is an author, editor, speaker, musician and spoken word artist. He co-founded Milagro Christian Church in Pueblo, Colorado with his wife in 2004. Contact through the form on his website.