When it's a sharing and improvisational meeting, where you're riffing off other people's ideas, that actually can be productive.
What you end up seeing when you look at history is that people who have been good at pushing the boundaries of possibility, and exploring those frontiers of good ideas and innovations, have rarely done it in moments of great inspiration. They don't just have a brilliant breakthrough idea out of nowhere and leap ahead of everyone else.
I love those stretches where I've just been a writer - when I haven't been doing Internet start-ups - where I pretty much eliminate meetings from my life.
Every childhood has its talismans, the sacred objects that look innocuous enough to the outside world, but that trigger an onslaught of vivid memories when the grown child confronts them.