Crystal Cruises is sweetening its Family Memories program for winter holiday travel. Sail with five or more people on Crystal Symphony’s December 21 Hawaii cruise roundtrip from Los Angeles and the sixth guest goes free!   A free third berth is also available for children 17 and under.  You also receive pre-paid gratuities, $100 per person onboard credit, professional photos of the group and $500 credit toward a shared Private Adventure.  The Pacific Coast Holiday sailing visits Lahaina, Maui; Honolulu, Oahu; Nawiliwili, Kauai; Hilo, Hawaii; and Enseñada, Mexico. Christmas and New Year’s holidays will be celebrated at sea with soirees with mixologist-made cocktails, premium wines and champagne, gourmet cuisine, and live entertainment and dancing. Christian and Jewish clergy will host Christmas and Hanukkah services, and junior activities directors will lead children and teens in activities daily.  Groups of six must sail together in a minimum of three staterooms; other restrictions apply.