So all of the cast saying they hang out a lot and consider each other their best life friends is just a show?
I know Michael Dorn and Levar Burton didn't get on initially, but are on record as saying they are now close. Similar with Dorn and Marina Sirtis.
It seems though that the TNG crew generally got on the best. I've seldom heard Avery Brooks or Colm Meaney say that the DS9 crew still hang out, or Mulgrew or Russ for Voyager.