I recently discovered that Trip Advisor has a forum that discussed Weddings at the Hawthorne Hotel. I thought you might be interested in this forum, so here is the link:
http://www.tripadvisor.com/ShowTopic-g60954-i1100-k9464-Hawthorne_Hotel_wedding_reception_any_opinions-Salem_Massachusetts.html
If you do go there, and it is helpful to you, please let us know.
Juli