The coming together of people who engage in trade and industry in a particular area is?

The coming together of people who engage in trade and industry in a particular area is called a chamber of commerce. It's an organization that represents the interests of local businesses and works to promote economic growth and development in the community. A chamber of commerce may offer various services to its members, such as networking opportunities, business education and training, marketing and advertising assistance, and advocacy on behalf of the business community.