Xavier Cugat was its "king"
[DOC] [TLE] Xavier Cugat - Wikipedia [PAR] Xavier Cugat was a Spanish-American bandleader and native of Spain who 
spent his formative .... Jump up ^ https://www.discogs.com/Xavier-Cugat-And-His-
Orchestra-The-King-Plays-Some-Aces/release/2085936; Jump up... [DOC] [TLE] Xavier Cugat Facts - Biography - YourDictionary [PAR] Xavier Cugat (1900-1990), a classically trained violinist who conducted with his 
bow, was known in his lifetime as the Rumba King.