Our guild always does a show and tell segment. That would take about 20 minutes on average. It's so much fun to see what others have done and to get new ideas. You could also ask people to bring the worst quilt they ever made, thweir favorite quilt, a project that was their biggest problem and how they solved it, etc. We also do an evening work session a couple of times a year when we make baby quilts for the NICU or cancer hats for the cancer center.