Are you INSANE, OP!?! The nightlife in Leeds is fantastic! You've got the clubs that play the latest chart music like Oceana/Gatecrasher/Tiger Tiger/Space/Mission/Tequila, which are okay but I rarely go on them. Then you have the cheese nights like Fruity Friday at the union and Puro. So there's that.
Then you have all the indie clubs like Subculture, Cockpit, Wire.
There is a huge underground music scene too, mainly drum n bass, dubstep, house, breakbeat, electro... The Student Union holds big nights like Valve/Metropolis and Wax:On, and then you have nights like Insomnia at the O2 Academy, and then things like Subdub/Exodus at the Leeds West Indian Centre...and the famous Jagerbomb night at The Faversham is another of my favourite nights out.
And to top it off there are so many bars and pubs, so many that there is the famous Otley Run...
All in all, you'll find your musical niche. Leeds is great.