Hangouts allow multiple Google+ users to participate in spontaneous video chats. This is a feature brands can use to engage followers in targeted discussions or focus groups around the topics they care about.
Although only 10 people can participate in a Hangout at one time, the Hangouts On Air feature allows for Hangouts to broadcast to many more viewers who can watch events, product demonstrations, or focus groups in real-time.
It would be great to optimize this function by having monthly or bi-monthly Hangouts featuring internet marketing professionals. The Hangouts could be an open discussion of current trends, or rely on a specific hot topic. This allows your community to engage with you in a much more intimate way, and users would have to circle you in order to view the Hangout which would indirectly help grow the numbers, too.