The leader of a group or team sets up the group's page.
The leader tells the members of the group the URL.
The group members go to the page and indicate their participation.
As simple as that!
A bit more detail:
A leader for the group clicks on 'Create a new one'
under 'Work with Events'. This leader could be the team captain, the discussion leader
or whomever is willing to go through the steps of defining an activity.
The page creator first specifies basic information about the group: the name,
a maintenance password for later editing, a color theme, how many in the group, and
the type of schedule used for the group.
The page creator enters the names of the participants, e.g. team players, book group members,
committee members, whatever.
The information about the schedule is entered. There are two kinds of activity schedules:
An activity which recurs frequently, e.g. weekly, once a month, etc.
An activity, like a softball game, that is scheduled to be played against some specific team on
a specific date and time.
Once the event is defined, the leader notifies the group or team members of either
the full URL of the specific event, or of HTTP://ImGonnaGo.COM where
the participants can select from the pulldowns under either 'Sports' or 'Other'
the name of their group.