I am the secretary of a students' organisation. In our assemblies, me and 2-3 assistants have to take minutes. Until now, we have used Google Docs to edit the file at the same time. However, since it's roughly 250 people present and logged in the wifi, and the wifi in most hotels or universities isn't that capable, we have serious problems when the connection drops.
I am searching for some way that allows collaborative writing, off the internet, between a team of 3-4 people. Something involving setting up a local network can also work. Would love if it works with both Windows and Mac. Open source is also greatly appreciated.
Edit: Our terms in office are annual, so I'm also interested in a solution rather easy to use with people not that profficient in computers. Not mandatory though :)