I heard that the most recent local needs talk was regarding the evils of having non Witnesses at "our" gatherings. Since there's nothing really for "us" to talk to "them" about, and since "their" conversation will not involve anything to do with "The Truth", we should guard against "worldly" association.
It appears that the cult wants their members totally removed from anyone not a Witness. It's funny though, I knew a lot of unbelieving husbands that got invited to JW get togethers, studied, and became Witnesses.
I guess the time is so short now that there's no use fooling around waiting for the worldy ones to come to the ark of salvation.