Mary was an active member of the Rockville, Maryland Chamber of Commerce.   Membership in the Chamber of Commerce is a mutually beneficial investment by a business owner,  like Mary, and the community her business serves   The Chamber of Commerce keeps the business community aware of what may transpire in the city in which they do business.   The Chamber also provides an opportunity for business owners to join with their fellow members to renew and create friendships that are vital in the progress of their businesses.