How to be the most popular hostess in town"" is the promise of this compendium of advice to prospective party-givers. Planning is the proferred key to success, from breaking the ice to handling delayed departures. Simple recipes for mass feeding ensure that no one will go hungry and a succession of party plans Perle Mestasizes year-round practice. It's all very sensible, really, delivered with the faintly admonishing tone of a patient, well-intentioned parent. Girls who would not listen to this advice from their parents may take heed...but we wonder.