ON first impressions, the Crazy Horse cabaret in Paris isn’t an obvious venue for former Canadian prime minister Justin Trudeau to take new girlfriend Katy Perry for her birthday. Afterall, the evening’s entertainment always begins with a dozen female dancers dressed in little more than the Bearskin hats of Buckingham Palace’s Royal horse guards giving a new meaning to bare skin. But the legendary venue, which opened in 1951, has become a must for celebrities visiting the French capital. Last week Kim Kardashian wore a corset dress to celebrate her 45th birthday at a private party at the Crazy Horse....