Instead, there are people who are very open about sharing both what they know (which is impressive) and what they don't know (which is more important). I've never been in a group where people are more uninhibited about saying, "Wait -- I don't get it." As a result, everything we do gets enriched by some extremely good discussion.
When we don't have a formal presentation, we sometimes walk through a code project somebody's working on, or research a programming topic together (like dependency injection). Recently we've started publishing a simple programming problem and asking the members to bring a solution in their favorite language - reviewing the various solutions is a nice exercise in both language details and programming approaches.
Come see us sometime. We meet the second Wednesday of the month at 7:00 PM at the Dayton Chess Club.