By Denny Dyroff, Entertainment Editor, The Times “Calling All Divas,” which is being presented by the Keswick Theater (291 N. Keswick Avenue, Glenside, 215-572-7650, www.keswicktheatre.com) on March 2, is more than just one form of entertainment. It’s a play. It is a concert. It is an evening of fun in a theater. And, it is a world premiere. There are other things about the show that come in...