In the first global survey of its kind, we asked residents to review how good their city was for a night out on behalf of millennial travellers. Consumer insights revealed that socialising is one of the most important factors to Hostelworld’s key audience of young travellers when booking trips abroad. We used this to devise a campaign with huge global appeal that aimed to uncover which global city has the best nightlife, according to the locals. Interviewing over 4,000 people in 41 cities across the world, the study rated the best night out in five key areas, quality of nightlife, openness to others, safety, getting around and cost. Hamburg came top – scoring particularly well for the openness of its locals to tourists and how easy it is to get around the city, followed by Copenhagen and Berlin. The campaign generated over 100 pieces of coverage globally, including Guardian online, Mail Online, Metro, LadBIBLE, and international titles including Die Weld, La Repubblica, GQ France and Joe.ie.