What are the main settings in The Pigman and why are they important?

The broader setting of The Pigman is
Staten Island, NY in the 1960s.  Some of the more significant settings in the
Pigman are the school, the graveyard, the Pigman’s house, and the zoo.  The
school is the original setting in the book.  It is where John and Lorraine write the
book and the location of many of John’s infamous pranks.  The graveyard is John and
Lorraine’s original escape.  They go there to get away from their troubles, mainly those
residing in their homes.  The graveyard, though, gives way to Mr. Pignati’s house,
because there they find a more comfortable and secure place to spend their time.  This
is their home away from home where the hospitable environment Mr. Pignati lends to them
acts as their sanctuary more than their real homes ever could.  Finally, the zoo was Mr.
Pignai’s getaway, but unfortunately it ended up being the place where tragedy struck on
two occasions.  First, upon their visit, they found Mr. Pignati’s beloved monkey, Bobo,
dead.  Soon after learning of Bobo’s death, Mr. Pignati suffered his second heart attack
and died.