gotta agree with @Aggro . you can't just sit around and wait for an invite. you have to jump into parties or send out some invites of your own. we've got over 80 people in just the xb1 bungie clan. with that many people, i think it would be hard to have a tight group. what we have is a bunch of people with all different schedules that can freely jump into and out of parties with whomever they want.
i will also point out that almost all of the day to day communication and coordination for destiny takes place on the discord server.