That’s not true. It’s perfectly fine to have fun in Germany, as long as it doesn’t disturb the neighbours and is propperly announced to the local authities two weeks in advance using form SVaF-18/1-42.

The funny part is Germany has the lowest amount of working hours in the world

In Germany, on the other hand, it was just under 1,354 hours per year (26 per week and 3.7 per day), which was the lowest of all the countries studied.

https://en.wikipedia.org/wiki/List_of_countries_by_average_annual_labor_hours

Germans have lots of fun, it’s just that what they call fun, we call work.