Support/meet up groups: likes/dislikes?

Support/meet up groups: likes/dislikes? Hello! I’m a speech therapist and am looking into ways to support adults who stutter. Many people seem to express positive experiences with support groups / meet up groups. Wondering if anyone has any stories you’d be willing to share regarding your experiences—- things the leaders did that you liked or didn’t like, structures of the meetings, specific group conversation starters or activities that stood out to you or felt particularly helpful? Thank you :)