( CNN ) -- The annual sporting jamboree is the highlight of the social calendar for rugby fans who flock to the Hong Kong Stadium in their thousands . Fancy dress and beer-fueled boisterousness are the order of the day for many of the 40,000-strong crowd as a party atmosphere descends on the city for three days at the end of March . On the pitch , 28 teams will battle it out in a total of 71 matches with defending champions Fiji looking to repeat their recent success at the Japan Sevens .
Fiji provides the social showpiece of the HSBC Sevens World Series . The rugby tournament has been running for the past two years . Hong Kong has won the title for four decades .