"As partygoers arrive, ask them to write their name on a slip of paper and place it in one of two jars labeled with the possible genres. Then at the end of the party, pick out a name from the “correct guess” jar and give the winning guest a small gift, a galley or two hundred bookmarks with the address of your website. Give everyone else instructions on how to write an Amazon or Goodreads review when the book is out. These can be printed ahead of time and folded into the shape of a crane."
Jessica Francis Kane, “How to Host a Genre-Reveal Party,” McSweeney’s
Ha! So clever and delightful.