Can Asia’s rowdiest sporting event reinvent itself and help Hong Kong get its groove back?

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Open this photo in gallery: Australia's Ben Dalton in action with South Africa's Ricardo Duarttee during the Hong Kong Sevens at Kai Tak Sports Park, in Hong Kong on Mar. 28.Tyrone Siu/Reuters Jocelyn Barrieau always dreamed of playing in Hong Kong. Competing in rugby sevens – the faster, more dynamic version of the traditional game – Ms. Barrieau “desperately wanted” to take the pitch at Hong Kong Stadium, the legendary venue for the biggest, most raucous event on the global sevens tour. “As a player, it was a tournament I looked at with awe for many years, but never made...