Another party catchall--etiquette, planning, occasion and general menus, preparation. The ordinary meek soul who throws caution to the winds and entertains a small group about six times a year, may find some suggestions to vary the casserole and hot roll routine, but this is mainly for the pioneer hostess with vine leaves in her hair and unlimited energy. Celebrations range from wedding suppers to weekend guest collations, with provision made for those who would honor Flag Day and Columbus' Birthday. The menus are fairly exotic in spite of the dubious statement that males quail at sauces and delicate salads. Recipes for all unusual dishes are included. But this author is another who persists in serving shellfish for Golden Age parties, hastening the principals, we assume, to the pearly gates. Useful for clubs, but too extravagant and visionary for most hostesses.