Chicago-based chambers of commerce and business support organizations, often referred to as Neighborhood Business Development Centers (NBDC), assist in the development of small businesses in Chicago, serve as liaison between local businesses and the City of Chicago, and provide neighborhood business development services. They have a strong neighborhood network and coordinate efforts with local aldermen, the City, and other community partners. They can help start-up entrepreneurs and existing business owners. 
 

Neighborhood Business Development Centers (NBDC) Program

https://www.chicago.gov/city/en/depts/bacp/sbc/neighborhoodbusinessdevcenters.html