Some groups give each person a brief opportunity to share the highlights of the week, then allow one person to share in depth. Others focus the sharing around a question drawn from the weekly Lectionary Scriptures. Longer periods together help deepen the sense of community, and allow extended opportunities for sharing and mission work together. A weekend at Wellspring or Rolling Ridge is nice, but groups also plan an occasional Saturday at someone's home or at the church, or in the park. Retreat leadership, to help structure the time and help the process along, can come from within the group, or from outside.
Seekers is rich in leadership resources that can help plan or lead a group retreat.