On 12 July 1967, Florida newspaper the St Petersburg Times had an eye-catching front-page headline: “Dame Margot, Nureyev seized in hippie raid.” Police had busted a party in Haight-Ashbury, San Francisco, and unexpectedly ensnared two world-famous gatecrashers: Margot Fonteyn and Rudolf Nureyev, who had been in the city all of four hours. “Marijuana cigarettes were found at the scene,” noted the paper, although the two ballet dancers had to be released as there was no…