Probably Victor Sylvester, who was the only ballroom dancing instructor who was famous, a household name here, in the 50s and 60s. He had his own 'strict tempo' orchestra,with its own distinctive sound, which made many records which became standard material for dance schools .He presented shows on radio and TV, the Len Goodman of his day. He did have a dance school which, naturally, charged a lot for his personal tuition. He is credited with 'slow, slow, quick quick, slow' as a catchprase (!) . (It's the tempo for steps in the slow foxtrot)
Arthur Murray was an American equivalent, who had franchised dance schools.