The atmosphere at the Stadion An der Alten Försterei is unique and reflects the passionate support of the fans. Before each home game, Union supporters gather to welcome their team with a mix of songs, flags, and choreographies. This ritual, often starting hours before kick-off, creates an incomparable vibe that captivates both long-time fans and newcomers alike.

A special highlight is the so-called "Union Gates," typically set up at the stadium entrances. Here, fans come together to celebrate, sing, and share memories before heading to their seats. The anticipation and community felt during these gatherings are essential components of Union's fan culture.

The derby against Hertha BSC is another event marked in bold on the calendars of Union supporters. The rivalry between the two Berlin clubs brings an added intensity to the stadium. The Iron Ones' fans are known for their creative and often provocative banners, which they hold up during matches. These artworks are not only expressions of rivalry but also of dedication and pride for their club.

In the stadium, every minute of the game is celebrated. Fans are not just spectators; they are part of the action. When the team steps onto the pitch, the stadium erupts in deafening cheers, energizing the players and amplifying the atmosphere. Every goal is celebrated with a storm of emotions—ranging from euphoria to collective relief when the ball hits the net.

The traditions of Union fans extend beyond the match itself. After the final whistle, many supporters gather in nearby pubs to analyze the game, exchange anecdotes, and discuss upcoming challenges. These social gatherings are a sign of camaraderie and a sense of belonging that unites Union fans.

Throughout the city of Berlin, the red and white colors of Union are omnipresent. Whether in cafés, bars, or on the streets, fans proudly wear their club colors. This visibility is not just a mark of pride; it is also an invitation for others to become part of the Union family. The fan culture of Union Berlin is not only an aspect of football but a way of life deeply rooted in the city.