Durban

I have been asked to gather Drupalites in Durban to startup a local group. Can anybody therefore give me indication of how other groups are functioning and what is the objective for such a group. What is the community contribution and what benefits has to be offered to a member. What resources has to be contributed or demanded. What structure has to be followed in such a group, what skill level is required or not required etc. etc.

I have willing participants and they are keen to become part of it. I look forward to hear from you guys.