When I was an awkward teen, and then an awkward young adult, an older "cool kid" would have a bunch of other kids over to study the Watchtower every Wednesday evening. This was about from the time I was 18 or so until maybe age 24 - the guy was 5 or 6 years older. After the 1-hour study we'd order pizza, drink beer (in moderation of course ), watch TV, play pool, etc.)
For a nerdy JW kid with few social skills it was awesome! Having something to look froward to with other JW kids, even (gasp!) real girls, was the highlight of my week. It served to reinforce "the truth" in me, making me more enthusiastic for "spiritual" activities. Shortly after I stopped attending that WT study (moved away) I was appointed MS & 4 years later elder.
That was more years ago than I care to admit. Of course, nowadays, such an arrangement would quickly be squelched by virtually every elder body in the universe. Too dangerous, maybe someone will voice an "independent" opinion or ask a question that can't be easily answered, and there'd be no "spirit-appointed" elder there to control the situation.
And the result today of actively discouraging organized activities, spiritual or otherwise, among kids? The rampant apathy among the 33% who don't leave the org. by age 21.
And the funniest part of it all is the WTS has no clue why the kids leave! Or else they don't care. 'Cause certainly nothing ever changes.