Why were the Tivoli Gardens important to the Danes of Copenhagen?

In chapter 4 of Number the Stars, Annemarie, Ellen and Kirsti pretend that their paper dolls are headed to Tivoli Gardens amusement park to dance, watch fireworks, ride on the carousel and encounter handsome men. Annemarie fondly remembers days spend at Tivoli, which were filled with music, bright lights and fun. Tivoli Gardens is no longer open at the time of this story, however, and we're told that "German occupation forces had burned part of it, perhaps as a way of punishing the fun-loving Danes for their lighthearted pleasures."
Annemarie then recalls an incident a month earlier in which the Danes blew up their own naval fleet to prevent the Germans from gaining access, which makes her feel both sad and proud. Since these two examples of the effects of German occupation in Copenhagen are presented closely together in the story, we can conclude that they're related and important. Both are examples of the war's many effects on occupied cities, and both remind us of attributes of the Danish people: Tivoli points to the lightheartedness and innocence of the past, and in contrast, the burning of the naval fleet shows the grim reality under the present regime.