In 1890, Lilly founded the Commercial Club and was elected as its first president.

The fifteenth floor was home to the Commercial Club, a chamber for the city's politicians and socialites to powwow and address issues.

Hall was one of the organizers of the Commercial Club in 1902.

He usually served on a consultant basis, frequently for quasi-public or commercial interests such as the Commercial Club of Chicago.

It merged with the Commercial Club in 1907.

It was supported by the Commercial Club of Chicago.

The club remains in existence today tracing its origins back to the 17 founding members of the Commercial Club in 1877.

Martin has served as President of The Commercial Club of Chicago since 1999.

Dawes was a member of the Commercial Club of Chicago, serving as president in 1925-26.

The town had a Commercial Club, Fire Department, a band and a baseball team.