I'm with the band

I'm on stage, staring out at a sea of sweaty, excited faces. A band - guitarist, bass player and drummer - tunes up behind me. I grip the microphone as a booming voice announces my name to the crowd. So this is what it feels like to be a rock star. I'm Joan Jett, I'm Janis Joplin... I'm Avril Lavigne!

The first eardrum-perforating bars of I Predict A Riot fill the room, and suddenly I am Ricky from the Kaiser Chiefs! Immediately infected by the atmosphere, I can't help but jump about the stage like a lunatic, hands in the air, drunk on the roar from the crowd - and perhaps, but just a little bit, from the six vodkas it was necessary to down before my nerves were numb enough to take centre stage.

Sadly, it's not Wembley... yet. I'm at Zoo Bar in Leicester Square. More often it's the home of half-cut tourists experiencing the capital's nightlife. But tonight, and every Thursday, it's the setting for Karaoke Rock Star, and my five glorious minutes of fame.

This is the newest karaoke night to hit London and offers, possibly, the most intense karaoke high yet. Anyone who has felt the thrill of a three-hour session in a private room in Karaoke Box, and felt the deep disappointment when the microphone is switched off at the end of the night, will love it. In fact, they'll crave the high for days afterwards. Take it from me.

The basement room at Zoo Bar, packed shoulder-to-shoulder with an enthusiastic post-work crowd, vibrates with energy. The front few metres of the dancefloor turn into a grinning, pogo-ing mosh pit, and every singer that comes on stage is greeted with cheers, whistles and the kind of general hysteria usually reserved for acts with at least one platinum record under their belt.

This is karaoke to the power of 10, with none of the plinky-plonky, rip-off backing tracks from cheap DVDs. The band - called Rockaoke - is the real deal, a group of bona fide session musicians more used to providing music for the likes of Jarvis Cocker and Def Leppard than for a bunch of gurning amateurs.

Three years ago the trio came up with the genius concept of revamping the karaoke scene, and set about learning note-perfect renditions of dozens of rock songs, from classics like Sweet Child of Mine by Guns N' Roses, to Alanis Morissette's Ironic and Franz Ferdinand's Take Me Out.

Now, following a successful stint at Manumission's Ibiza Rocks last year, when Ricky Wilson jumped on stage in his flip-flops to belt out his own (almost certainly inferior to mine) version of I Predict A Riot, Rockaoke has become huge.

The presence of the band certainly adds a whole new dimension. It eradicates almost all those cheesy connotations. There's no S Club 7 reaching for the stars or Steps' Tragedy because the 200 songs on the list have been chosen for their gnarly guitar riffs and intoxicating drum beats. There's the requisite I Will Survive and It's Raining Men - they have to get the girls in somehow - but they are given the rock treatment.

Rockaoke lures obsessed individuals out of windowless karaoke chambers and gives them the audience they secretly crave. And the most reluctant performer would have to admit that the stage environment makes for a far more electrifying night.