Dr. Elizabeth E. Carr is a California and Paris based marriage and family therapist with a Ph.D. in spirituality. Dr. Carr has worked and lectured in nine countries across Asia, the Americas and Europe.

Linda Hardin is national coordinator for the Church of the Nazarene’s single adult ministries.

Paul Jarzembowski is the USCCB representative to the National Catholic Young Adult Ministry Association, which is an outreach to singles and couples in their 20s and 30s.

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.

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.

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.