Conversation so far:
How did Herb Jeffries's music career begin?
From Detroit, at the urging of Louis Armstrong, Herb Jeffries moved to Chicago where he performed in various clubs.
What year was when Herb Jeffries moved to Chicago where he performed in various clubs?
Erskine Tate signed the 19-year-old Herb Jefries to a contract with his Orchestra in Chicago. While there Herb was spotted by Earl Hines, who hired him in 1931
What did Herb Jeffries gain with his big break?
Herb Jeffries's break came during the 1933 Chicago World's Fair A Century of Progress International Exposition singing with Earl Hines Orchestra on Hines' national broadcasts live from Grand Terrace Cafe.
Was Herb Jeffries with a company?
In 1945, Herb Jeffries had a hit on the Billboard R&B chart with Left A Good Deal In Mobile; he was accompanied by pianist Joe Liggins and his band Honeydrippers.
What happened next in Herb Jeffries's life after his billboard hit?
Then, Herb Jeffries moved to Europe and performed there for many years, including at nightclubs he owned. He was back in America by the 1950s and recording jazz records again.
Around what year was did Herb Jeffries move to Europe to perform?
In 1945, Herb Jeffries had a hit on the Billboard R&B chart. Then, he moved to Europe and performed there for many years, including at nightclubs he owned.

Question: How many nightclubs did he own?
Self-contained rewrite: How many nightclubs did Herb Jeffries own?