I came across these papers I saved from breakfast on the Empress Lily Riverboat back in Sept. 1981. It was a very nice sitdown breakfast and the characters came around to each of the tables. It was the first character breakfast we ever went to. I don't remember if there were other ones going on at Disney at that time.
In 1984 the boys were given these papers when attending Minnie's Menehune
Breakfast. If I remember correctly, it was held in the Poly. My husband I disagree on the exact location in the Poly, but I thought you entered where the sushi bar is today and there was a room in the back. It may have been a buffet.