Description Available in: Basketball Club Oostende, for sponsorship reasons Filou Oostende, is a Belgian professional basketball team. The club is based in Ostend and was founded in 1970. The club competes in the top Pro Basketball League (PBL). Oostende is the most successful basketball club in Belgian history, as the club's honour list includes a record twenty-two Belgian League championships, a record nineteen Belgian Cups and eleven Belgian Supercups.