How do you network in a group?

https://www.youtube.com/watch?v=jh_dlIye2Ug

Though the video (12 minutes) talks about business networking, it applies to every group you'd like to join, and how do reduce the chances of the "shies".

What type of group is it? What purpose does it serve for you to attend?

What can you find out about the people who are attending? How do you choose which ones you would like to meet?

How do you "break into" a group? What are the signs that they are open to you joining?

What are the benefits of "chaining" and using as leverage those whom you already know?

What kind of questions do you ask? How can you be a good listener, and find out what you have in common?

What kind of handshake do you have, and how might that be useful?