If there is one thing travelers can bring home from Europe it is the attitude about work-life-balance. The famous question "Live for working or work for living" has a clear answer in a lot of European destinations.
A study came up with this top ranking list.
https://www.getkisi.com/work-life-balance
I would put a little question mark on that because Copenhagen will definitely be unter top 7.
As a traveler you can see that people in these cities really enjoy their after-work-life, also colleagues together for a drink or two before going home. Enjoy strolling some places, e.g. reaturants along canals in summer and get in touch with locals celebrating that way of life.