Luxury line Crystal Cruises has been making a big play for multigenerational family groups, with its dedicated play areas and kids’ programming—especially during holidays and the summer school break. The 46-year-old Indiana woman had been to Key West several times before, but as she and about 900 aboard Royal Caribbean’s oldest and smallest cruise ship arrived, the Southernmost City was devoid of its usual joyful noise and. 7 Night Southern…