Me, I'm comfortable having somewhat meandering discussions. One of our meetup best practices suggests that groups have more success (measured in terms of interest and retention) with a project or something specific to do rather than socialization. Maybe we cut in the middle of that with a discussion group rather than resembling a cocktail party. I am also concerned that having something that looks like a homework assignment would cut against our "all are welcome" goal.

So perhaps I could rephrase it as "what do you (general you) want from a meetup?" The link has some ideas that have worked nicely elsewhere.