Purchase tickets and join the fans at a game at Rapid Vienna Gerhard-Hanappi-Stadion. If there's nothing on while you're in the area, you might like to check if the stadium offers a guided tour of the grounds.
This sporting facility is often on the itineraries of visitors to Penzing. But Rapid Vienna Gerhard-Hanappi-Stadion isn't the only drawcard in the area. Schönbrunn Palace, Vienna State Opera, and Hofburg Imperial Palace are some other worthwhile sights nearby.