It all began last December when a Facebook campaign put Californian band Rage Against the Machine’s song Killing In The Name at the top of the UK single charts, beating X Factor winner Joe McElderry to Christmas number one. It was the first time in five years that a winner from the TV talent show ( as well as producer Simon Cowell) had not enjoyed a Christmas No. 1.

More than 180,000 people applied for tickets to the concert via an online lottery. I was one of the lucky 40,000 winners, but that didn’t stop several hundred ticketless fans scaling the fence.

It was a star-studded list of support bands including punk-veterans Gallows, hip-hop superstar Roots Manuva and gypsy-punks Gogol Bordello, who warmed up the crowd.

The crowd was ferocious when RATM came on stage and the band didn’t disappoint. Their rendition of popular 1992 track Bullet in the Head confirmed the band had lost none of its raw energy.

RATM called Jon and Tracy Morter, the couple who orchestrated the Facebook campaign, on to the stage in order to present a cheque — 100% of the proceeds from the Killing In The Name single were donated to the homeless charity Shelter.

Zach De la Rocha then paid tribute to the British punk tradition with a cover of The Clash‘s White Riot.

Finally the band left the stage before the encore, and the sound system pumped out X Factor winner’s single The Climb, while quotes from the newspapers filled the screens recounting the countdown to the Christmas Number one single sales. The words flashed up: “YOU Made History” as the the band rejoined the stage to play their biggest hit and last song of the night, Killing in the Name, and the crowd went wild.

“This is where you do your Beyonce flick” said our chirpy dance instructor.

There I was, amongst dozens of women that had braved a drizzly British summer evening to shake our booty on the South Bank, under the gaze of thousands of tourists in the London Eye.

The Nike women training club is not a traditional boot camp. There were no scary military instructors, no drill whistles and no push ups. Instead, we found ourselves entertained by a live DJ as the dancers in a blaze of colour and energy wove through the crowd busting their moves.

It wasn’t long before we were joining in, learning to groove, bump, grind and bounce as the DJ spun her tunes. I’ve never been that great with choreography – unless you count knowing every move in The Timewarp – and I felt a little self conscious at first. But all notions of British reserve disappeared with the Beyonce flick. There is no room for wallflowers in this class. And this was too much fun to be a workout. The rain was forgotten, and before I knew it, hey, I’d done the moves right. All in all, the Nike women class is a great way to challenge yourself, make new friends and learn new skills. The only downside was, like all good parties, it ended too soon.

The next Nike Women Outdoor Training Session is on 9 September. Visit www.nikewomen.com for more information.