From 1904, the Jewish labor and anarchist movements in London reached their "golden years", according to William J. Fishman.
In 1905, publication of Germinal resumed, it reached a circulation of 2,500 a year later, while Arbeter Fraint reached a demand of 5,000 copies.
In 1906, the Arbeter Fraint group finally realized a long-time goal, the establishment of a club for both Jewish and gentile workers.
The Workers' Friend Club was founded in a former Methodist church on Jubilee Street.
Rocker, by now a very eloquent speaker, became a regular speaker.
As a result of the popularity of both the club and Germinal beyond the anarchist scene, Rocker befriended many prominent non-anarchist Jews in London, among them the Zionist philosopher Ber Borochov.

From June 8, 1906, Rocker was involved in a garment workers' strike.
Wages and working conditions in the East End were much lower than in the rest of London and tailoring was the most important industry.
Rocker was asked by the union leading the strike to become part of the strike committee along with two other Arbeter Fraint members.
He was a regular speaker at the strikers' gatherings.
The strike failed, because the strike funds ran out.
By July 1, all workers were back in their workshops.

Rocker represented the federation at the International Anarchist Congress in Amsterdam in 1907.
Errico Malatesta, Alexander Schapiro, and he became the secretaries of the new Anarchist International, but it only lasted until 1911.
Also in 1907, his son Fermin was born.
In 1909, while visiting France, Rocker denounced the execution of the anarchist pedagogue Francisco Ferrer in Barcelona, leading him to be deported back to England.

In 1912, Rocker was once again an important figure in a strike by London's garment makers.
In late April, 1,500 tailors from the West End, who were more highly skilled and better-paid than those in the East End, started striking.
By May, the total number was between 7,000 and 8,000.
Since much of the West Enders' work was now being performed in the East End, the tailors' union there, under the influence of the Arbeter Fraint group, decided to support the strike.
Rudolf Rocker on the one hand saw this as a chance for the East End tailors to attack the sweatshop system, but on the other was afraid of an anti-Semitic backlash, should the Jewish workers remain idle.
He called for a general strike.
His call was not followed, since over seventy percent of the East End tailors were engaged in the ready-made trade, which was not linked with the West End workers' strike.
Nonetheless, 13,000 immigrant garment workers from the East End went on strike following a May 8 assembly at which Rocker spoke.
Not one worker voted against a strike.
Rocker became a member of the strike committee and chairman of the finance sub-committee.
He was responsible for collecting money and other necessities for the striking workers.
On the side he published the Arbeter Fraint newspaper on a daily basis to disseminate news about the strike.
He spoke at the workers' assemblies and demonstrations.
On May 24 a mass meeting was held to discuss the question of whether to settle on a compromise proposed by the employers, which did not entail a closed union shop.
A speech by Rocker convinced the workers to continue the strike.
By the next morning, all of the workers' demands were met.
From 1904, the Jewish labor and anarchist movements in London reached their "golden years", according to William J. Fishman. In 1905, publication of Germinal resumed, it reached a circulation of 2,500 a year later, while Arbeter Fraint reached a demand of 5,000 copies. In 1906, the Arbeter Fraint group finally realized a long-time goal, the establishment of a club for both Jewish and gentile workers. The Workers' Friend Club was founded in a former Methodist church on Jubilee Street. Rocker, by now a very eloquent speaker, became a regular speaker. As a result of the popularity of both the club and Germinal beyond the anarchist scene, Rocker befriended many prominent non-anarchist Jews in London, among them the Zionist philosopher Ber Borochov.
From June 8, 1906, Rocker was involved in a garment workers' strike. Wages and working conditions in the East End were much lower than in the rest of London and tailoring was the most important industry. Rocker was asked by the union leading the strike to become part of the strike committee along with two other Arbeter Fraint members. He was a regular speaker at the strikers' gatherings. The strike failed, because the strike funds ran out. By July 1, all workers were back in their workshops.
Rocker represented the federation at the International Anarchist Congress in Amsterdam in 1907. Errico Malatesta, Alexander Schapiro, and he became the secretaries of the new Anarchist International, but it only lasted until 1911. Also in 1907, his son Fermin was born. In 1909, while visiting France, Rocker denounced the execution of the anarchist pedagogue Francisco Ferrer in Barcelona, leading him to be deported back to England.
In 1912, Rocker was once again an important figure in a strike by London's garment makers. In late April, 1,500 tailors from the West End, who were more highly skilled and better-paid than those in the East End, started striking. By May, the total number was between 7,000 and 8,000. Since much of the West Enders' work was now being performed in the East End, the tailors' union there, under the influence of the Arbeter Fraint group, decided to support the strike. Rudolf Rocker on the one hand saw this as a chance for the East End tailors to attack the sweatshop system, but on the other was afraid of an anti-Semitic backlash, should the Jewish workers remain idle. He called for a general strike. His call was not followed, since over seventy percent of the East End tailors were engaged in the ready-made trade, which was not linked with the West End workers' strike. Nonetheless, 13,000 immigrant garment workers from the East End went on strike following a May 8 assembly at which Rocker spoke. Not one worker voted against a strike. Rocker became a member of the strike committee and chairman of the finance sub-committee. He was responsible for collecting money and other necessities for the striking workers. On the side he published the Arbeter Fraint newspaper on a daily basis to disseminate news about the strike. He spoke at the workers' assemblies and demonstrations. On May 24 a mass meeting was held to discuss the question of whether to settle on a compromise proposed by the employers, which did not entail a closed union shop. A speech by Rocker convinced the workers to continue the strike. By the next morning, all of the workers' demands were met.
Rudolf Rocker