They carry their flag on their Big Adventures and then bring the flag back for hanging at the clubhouse. I don’t know what makes an adventure big enough to warrant a flag but maybe it’s just a personal thing.
The program was really very entertaining. There was a speaker from JPL talking about comets (an enthusiastic professional), a guy from Lockheed-Martin talking about testing jets (not too well prepared but the crowd loved the topic), a woman who had done a survey of all the statues on Easter Island (knowledgeable presentation but a little flat on the charisma scale), and a guy who talked about Polynesian sailing (had done his slideshow many a time). It was good. I’d go again.