I look after a club with around 400 members in the North Shore area. I am trying to get an idea of where the best centre of members is located. Am wondering what is the easiest way of doing this and is there and software that could help me. What I want is the equivalent of a paper map of the North Shore with pins locating each members residence and would then have a map which would reflect the of people's location.

While I could do it the manual way it would be great if there was some software that would let me feed in the addresses and do the magic for me. Ideally that would enable me to send to members to illustrate our best location to serve the greatest number of people.

Google Maps could probably help but not sure how.

All suggestions appreciated