You may be wondering why I have AP Style entries juxtaposed against those concerning fiction. I assure you, there is a good reason. Many creative writers have what we call "day jobs," and/or we write articles, brochures, textbooks and the like to pay our day to day bills. If you find yourself in this category, I believe a little AP know how will go a long way until you and your muse make it big.
DESCRIPTIVE NAMES: Some governmental, corporate and institutional organizations with a descriptive word in their names use an apostrophe; some do not. Follow the user's practice:
Actors' Equity, Diners Club, the Ladies' Home Journal, the National Governors' Association.
See separate entries for these and similar names frequently in the news.
--Source: The Associated Press Stylebook and Libel Manual, Norm Goldstein, Editor, p. 164