Within a year, the Chicago club had become so large it became necessary to adopt the now-common practice of a regular meeting place.
The next four Rotary Clubs were organized in cities in the western United States, beginning with San Francisco, then Oakland, Los Angeles and Seattle. The National Association of Rotary Clubs in America was formed in 1910. In April 1912, Rotary chartered a club in Winnipeg, Manitoba, Canada, marking the first acknowledged establishment of an American-style service club outside the United States. To reflect the addition of a club outside of the United States, the name was changed to the International Association of Rotary Clubs in 1912.
In August 1912, the Rotary Club of London received its charter from the Association, marking the first acknowledged Rotary club established outside of North America. It later became known that the Dublin club in Ireland had been organized before the London club, its first meeting having been held on February 22, 1911, but the Dublin club did not receive its charter until after the London club was chartered.
During World War I, Rotary in Britain increased from 9 to 22 clubs, and other early clubs in other nations included those in Cuba in 1916, Philippines in 1919 and India in 1920. In 1922, the name was changed to Rotary International. By 1925, Rotary had grown to 2,106 clubs worldwide with 110,500 members.