I don't know if this qualifies, but we used to live next to a very "upper crust" elderly couple who would have us over for drinks occasionally. One time they called up and we declined, as DH's sister was visiting. They said bring her along, so we did.
We sat in the LR and had drinks and popcorn, which they served in a large bowl, with a large silver spoon to dish it out, and individual bowls to dish it out into. I suppose it makes sense from a germ point of view, we had just never seen it done before. SIL remembers it to this day!