...remember the dangers of the New Groupthink. If it's creativity you're after, ask your employees to solve problems alone before sharing their ideas. If you want the wisdom of the crowd, gather it electronically, or in writing, and make sure people can't see each other's ideas until everyone has had a chance to contribute.
Susan Cain (2012). “Quiet: The Power of Introverts in a World That Can't Stop Talking”, p.266, Broadway Books