What is the importance of Blake's Inn in the poetry collection, A Visit to William Blake’s Inn?

Blake's Inn is the setting of most of the action in the poems, although there is a notable exception, when the characters take a walk on the Milky Way. It seems to be a transmutable place. Sometimes rooms are big; other times, they are small. The reader can see Blake at work in some of the rooms, and can often see characters asleep or not throughout the book. The inn is rendered in the illustrations in approximate 3-D in the style of many 18th century illustrations. More than its physical nature, however, its spiritual nature is the main content of the poem. This is a place where one learns lessons, sees things anew, and gets a chance to have a rest. Things don't always make literal sense, but they are always interesting and mind opening.