River Cruise New river cruise line to have black ships By Michelle Baran / August 30, 2017 Share 1 -- Millennial-focused river cruise line U by Uniworld has unveiled renderings of its ships, which will have all-black exteriors, as Uniworld had hinted previously. The new line's first sailings will depart in April.Announced earlier this year by Uniworld Boutique River Cruise Collection, the new line features lower-priced sailings than the company's luxury line. U's guests will pay $250 per day on average, compared with $330 per day for Uniworld Boutique's lowest-priced off-season cruise. U's product is tailored for travelers ages 21 to 45 with fewer inclusions than its higher-priced sister line.The line will consist of two vessels. The A (formerly Uniworld's River Ambassador), wil sail the Danube, Main and Rhine rivers. The B, formerly Uniworld's River Baroness, will sail on France's Seine River. Both will launch on April 14. The vessels will be renovated to feature a main lounge, a rooftop lounge, a gym, a coffee bar and two dining establishments -- a main restaurant and a rooftop venue. There will be three categories of staterooms ranging from "I just need a comfortable place to sleep and stash my stuff" to "I'm going all out in a suite," according to the U by Uniworld website. For solo travelers, there will be single rooms and the cheaper option of bunking with another passenger.An interior rendering shows a stateroom on The B featuring clean lines and decor, crisp white linens and a French balcony. U by Uniworld sailings include two meals each day (mostly breakfasts and dinners) and one or two excursions each day. There will be optional excursions offered each day for an additional charge. Seine cruises will include a wine tasting, Danube sailings will include a mixology class, and all sailings will feature a party hosted by a local DJ.