A labyrinth of stories (where you can lose your self)

A plot of stories (a plot that grows other plots)

A festival of stories or A celebration of stories
(Where stories come together for - whatever)

A tete-a-tete of stories
(where a-tete-a-tete sounds like a machine gun)

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Edited later to add :

The best collective phrases I have come across is : Dam-Burst of Dreams

It is title of a book by an Irish writer Christopher Nolan (who I think is brilliant). This particular book is a collection of poems and writing by him, which I have not been able to access. I am sure he writes beautiful poetry. The title is poetry.