In TV series and films I sometimes come across enumerations that lack the "and" or the "or", and sometimes even have something very different used instead.
What do you want coffee with? Milk, chocolate?
So where are we going to? France, England, Germany, maybe Italy?
I want to make pasta with mushrooms, tomatoes, cheese.
Is it a an acceptable way to enumerate in both formal and informal English or only in informal English? What is the grammar behind this style?