The Green Mill Cocktail Lounge is a historic jazz club located in Chicago, Illinois. Established in 1907, it has a rich history and is known for its vintage decor, including a long bar and intimate seating. The venue has hosted many famous musicians and remains a popular spot for live jazz performances. The lounge is also notable for its Prohibition-era past, where it served as a speakeasy. Today, it continues to attract both locals and tourists, offering a unique atmosphere that combines music, cocktails, and a glimpse into Chicago's vibrant nightlife history.