SirNose, in this area it is the service meeting; and yes, people leave after the school even when they had a talk that evening.
One CO visit he gave these stats
1) Book study (my theory, 1 hour and mostly in a private home)
2) WT study (yes, people skip the public talk especially if in the am)
3) Public talk
4) TMS
5) Service Meeting
He pointed out the paradox that there were more people at the WT Study than the public talk (assuming I suppose that a "public" normally came and left after the talk) and that there were fewer people at the Service Meeting which meant that people were leaving after the TMS. Boy, was he upset.
Blondie