I remember the "15 minute break." On Sunday half the Hall left "at the half" and the WT Study was sheer agony because it was 75 minutes long with very few to support the answering. It fell to the older ones who had been around for years and some of their answers could be...literally...five minutes long as they went through entire "scripture chains" to make a point.
There was a 15 minute break between the Ministry School and Service Meeting as well. The literature counter would open, people would line up to buy publications (they cost back then), mothers would stand at the back and talk. When time was called people would argue with the Literature Servant, wanting him to take care of their literature order after the meeting began. There was always talking and clinking money sounds coming from the literature counter during the second half. Magazines were unwrapped, counted, and put into slots marked with publisher's names; apparently this couldn't be done at any other time than during a meeting.
At our Hall the rest rooms were upstairs, as was the Library/Mother's Room. There was a steady stream of young mothers with babies marching up and down those stairs during the meeting. Every time someone opened the door to the Ladies Room the sound of several conversations could be heard. At one point they appointed a bother to clear out all the Sisters who weren't actually there to use the facilities. All that did was move the Sisters to the Library across the hallway!
Meetings were different back then...