I vaguely recall the hot meals at circuit assemblies, but those were done away with in the early 80s from what I can remember.
In Canada, we had the worst drink known to mankind: Cott Cola. The Society must've got a great deal on this stuff. Imagine sucking back a warm, burning cola in the hot as Hades stadiums. This stuff was so acidic, it was undrinkable even when cold. Sweating away, drinking a Cott cola at lunch was a sure recipe for incredible illness in the late afternoon listening to the droning.
The puddings were a fave amongst kids, especially when they were still frozen. The puddings got cheap over time and had these little indentations in the bottom of the cup making it look bigger than it actually was.
I too remember that it was a sin that some ate offsite and were not "supporting Jehvovah's bank acct... err... arrangement." I couldn't believe at the time that attendants were on the lookout for homeless trying to nab a free meal. No shirt, no badge, no service! Drink life's water free, but hands off our damn sandwiches!
I loved looking forward to work in the food department. I got to start the sessions late and leave the sessions early to do my job. It was great getting out of it!
Over time, I would simply leave the assembly early. I remember running into an elder I seriously disliked in the parking lot. He asked me where I was going... I replied with a smile and said "where are you coming from?"