http://blog.bufferapp.com/introverts-and-extroverts-what-the...
I don't mean to imply that introverts like movies and extraverts don't. Only that, as a manager of developers, you should seek to understand the type of people on your team along many different dimensions, introversion and extraversion being one of them. Then cater your activities for those particular people. What worked for the mix of people on my team may not necessarily work for the mix of people on your team.