[5] With the establishment of the Republic of Turkey in 1923 it was briefly renamed Pera Sports Club and, later that year, was formally registered as "Beyoğlu Spor Kulübü".

The Volleyball department of Beyoğluspor was one of the most distinguished teams in Turkey during the 1940s and 1950s, while it also won the Turkish championship for some years that period.

[3] The efforts of the club managers and presidents, such as G. Chalkousis, S. Kanakis, G. Mouzakis, A. Tripos, played a determining part in these successes.

However, Beyoğluspor witnessed a dramatic decrease of its supporters for a period when Lefter Küçükandonyadis, a Turkey national football team player of Greek descent and one of the best players in Turkey in 1950s and 1960s, played for Fenerbahçe, turning most of the local Greeks to change temporarily their support to Fenerbahçe.

[9] Today, Beyoğluspor is one of the few surviving Greek foundations of the city and fields teams in volleyball, basketball and football at the amateur level.