There is this sentence that Holden says that helps us find out about his exact location in the story:
<em>“This one psychoanalyst guy they have here, keeps asking me if I’m going to </em><span><em>apply myself when I go back to school next September.”
</em>Based on this sentence, we can conclude that Holden is in a psychiatric hospital, where his mental state is being estimated.<em>
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I placed all my corrections between two (), comment if something is not clear.
Is (to) set a date and find the location.
out the menu, (as well as the) entertainment.
input from other(s) and (assign) them tasks to (complete).
mail the invites out(no s).
or event (got underway, I would)
the guests(s) (were) having a good time.
You could try YouTube, I know that some posts say that they have the full movie. It's worth a try!