In the 1970s I was sharing a house. One night we were cooking a big baked dinner and someone noticed a good double feature on at the drive-in. When dinner was ready we packed everything up in an esky to keep it warm, took crockery and cutlery and ate dinner at the movies. It was such fun we did it every now and then.
The true staple of Australian movie going is the choc-top icecream cone which has exixted since I was a kid and is still available today. Hot food is verboten here.