Male citizens of ancient Athens were primarily expected to actively take part in the Assembly. The Assembly (Ekklesia) was the principal body of Athenian democracy, where citizens gathered to discuss and make decisions on important political issues, laws, and policies. Voting in the Assembly was a civic duty and a key aspect of participating in the democratic process.
While joining the army was also a responsibility, particularly for citizens, there was no specific requirement for a set number of years of service for all male citizens. Jury service was common, but it was not restricted to members of the same class, as juries were composed of citizens from various backgrounds. It's important to note that participation in the Assembly was a fundamental expectation of citizenship in ancient Athens.