Athens was the headquarters of Greek philosophy – chiefly the Epicureans (eat, drink, and be merry for tomorrow we die), and the Stoics (self-sufficient, self-reliant, and self-sacrificing). Paul is brought out to speak at the Areopagus because of what he was saying to Jews and Gentiles in Greece.
The Areopagus was a forum from where ideas, new and old, were voiced for public consumption. This settings purpose was as much entertainment as it was information (vv. 19-21). Much like Facebook, Twitter, etc. are in our day.