Directory A to Z Go back to directory. Seacoast Dancesport Seacoast Dancesport Home Harborside Athletic Club 1 Raynes Ave. Portsmouth New Hampshire 03801 UNITED STATES home Work Phone: 6035023267work Work Email: frednliz@gwi.netINTERNET Website: http://www.seacoastdancesport.com Categories: Uncategorized Updated 9 years ago.