The music definitely had that "swing." On Sunday, July 22, scores of beachgoers, bicyclists and strollers celebrated the 75th anniversary of Jacob Riis Park, as they enjoyed a live concert showcasing the "toe tapping" hits of the Big Band era. The event, staged at the site of the original Riis Park Bandstand on the boardwalk at Bay 9, featured the sounds of M.A.S. Swing, under the direction of bandleader Marie Stack and musical director Walter Birkhold. Standards by Cole Porter, Benny Goodman, Duke Ellington and others filled the program.