How do you prepare for the world’s largest indoor jazz festival? Well, if you’re Rotterdam, you hold a two week, pre-festival celebration. North Sea Round Town is a collection of concerts, exhibitions, lectures, street performances and jam sessions. In 2015, there were more than 200 events throughout the South Holland city, and 2016 looks to be even bigger. (North Sea Round Town’s Facebook Page is the place to go to keep up-to-date on this year’s events.) Popular venues like...