Michelle,
"The Square" is where most people hang out for drinking before heading to one of the clubs.....of which there are many ! Most clubs don't charge entry before 1am and even then it's usually only around £4CYP entry, but with all the PR's floating around she shouldn't ever have to pay as they give away free entry flyers most of the night.
The top clubs tend to be :
Black & White
The Castle
Starskys
Car Wash
To name but a few.
And there's a revamped club opening called Play, they've got loads of top DJ's on this year including Judge Jules, Lisa Lashes & Tall Paul. The club is opposite the Green Bungalows on Ayias Mavris Sreet.
Hope that helps, if you need any more info just let me know