They were once seen as the holiday of choice for the over-60s looking for cabaret and formal dining. Now, cruise companies are pushing the boat - or ship - out in an attempt to attract younger customers through the use of futuristic tech. From bionic bars to high-speed internet and even puzzle rooms, the latest launch of Harmony of the Seas is hoping to introduce these gadgets to a wider audience. The Bionic Bar, pictured, is powered by roboticists at Makr Shakr. Customers order cocktails, from either a set a menu or by designing their own concoction, and the order is sent to a pair of single-armed robots attached to a makeshift'bar' Harmony of the Seas made its inaugural sailing last weekend and started its first trip to Rotterdam on Tuesday.