The Home Interest Society, founded in 1870, assembles at the Brooke home Walbrooke in 1899. The Home Interest is the recorder of births, deaths and other events for future Annals. It also receives a monthly report of a Railroad Committee, spoofing the cherished dream that the train one day would chug through Sandy Spring. It and the similar Neighbors Club (1897) both still flourishing, bear out Annals historian William Henry Farquhar's observation of Sandy Springers as practitioners of "the science of combined action."

A blood donor of the Sandy Spring Lions Club gives another pint--one of 85 given during fifty years by Lion Willard Derrick. Derrick, Jim Kibbe, Tim Conner, and John Howes wear the wide-brimmed hats of the Ten Gallon Club (80 pints or more), and many more Lions give regularly. With some 80 active members, the Sandy Spring Lions are one of the strongest chapters in a district that includes Montgomery, Charles, and Prince Georges Counties and Washington,D.C. The local Lions pitch into numerous civic projects, including maintenance of the Sandy Spring spring.