[1] On December 31, 1904, the club's General Assembly unanimously approved its conversion into a Limited Liability Company.

Its documentation is retained in the Cascais Municipal Archives, held at the nearby Casa Sommer.

The military was represented by Hermenegildo Capelo and Henrique Mitchell de Paiva Couceiro, while writers included Camilo Castelo Branco and Edgar Prestage, Britain's leading authority on Portuguese history and literature.

Its importance was noted by the writer Ramalho Ortigão who in October 1888 wrote that “The Sporting Club [...] has given [Cascais] an air of civilization .

Several garden games have been properly established and are regularly attended.” The club played a leading role in popularising both tennis and football (soccer) in Portugal.

Participants included the British player, Noel Turnbull, who had won a gold medal at the 1920 Olympic Games and the Spaniard Manuel Alonso Areizaga.

Guilherme Pinto Basto and the Cascais Club organised the first game on the Portuguese mainland thirteen years later.