I am reading a play, in a coversation one of characters refered to table setting and ask " which way does this go, now?" what is that about? about eating ? or cleaning the table?
In table setting, dishes, glasses and cutlery are arranged in certain conventional patterns. How these items are placed can be referred to as how they go.
One of the definitions of go is
(Of a thing) lie or extend in a certain direction [Oxford Dictionary Online]
In particular, cutlery is often placed in a certain order, on a certain side, next to other specific cutlery and, in the case of knives, with the edge facing a certain way.
That's the way they go.