Recruit participants with class, race, age and other diversity in mind. Reach beyond the usual suspects, and keep extending warm one-to-one invitations.
Meet someplace comfortable, with snacks or a meal.
Appoint a facilitator for each session who will pose the questions, keep the discussion on topic, and encourage quiet people to speak.
Make a clear agreement on commitment to preparation (reading or watching ahead of time).
At the first session, get group agreement on some groundrules.
Listen to each other intently. Bring an attitude of respect and curiosity.
Step up, step back: Talkative people hold back, quiet people speak up.
Confidentiality about any personal or organizational sharing.
Disagreements are fine; personal putdowns are not OK. All questions are good questions.