The Congregation I joined when I moved after marrying my wife in 1970, was much as Blues Bro described his first one.
But maybe a tad more relaxed, with even more laughter, I remember one occasion when something that was said, I cannot remember exactly what, resulted in uproarious laughter from the audience, and the Elder on the Platform laughing so much his head ended up resting on the Rostrum as he struggled for breath !
One new convert remarked to me "This place is more like a Music Hall than a church !" , he was referring to the many audible comments from the audience that were regular at the time, and often funny.
But today the org. is a dull miserable place, where laughter is minimal, and an event as above described would be frowned upon, so not happen.
The J.W's have indeed lost more than they know, and made the org. far less appealing.