Kilroy's and Santos Laundromat. Everyone I know uses Santos. You can wash your own or have them wash and fold. Both are on South Shore Road, renamed recently to something like Rufus Pimpy Road, past Inn at Tamarind Court. Google maps shows the right location.
S/V Echoes, 2003 Beneteau 423 Coral Bay, St. John USVI - Grenada (summer)