The three-piece, who are through to Judges' Houses, described the behaviour off camera from some of the contestants as "crazy".
"People were running down corridors naked. It was crazy. People were hooking up everywhere," the band told Metro.
"Everyone was trying to show off their X Factor in all senses."
The group will have to impress Louis Walsh and Sharon Osbourne at Judges' Houses in Las Vegas and are hoping to be one of three acts selected to make the Live Shows.
The X Factor Judges' Houses rounds air on Saturday and Sunday (September 29 and 30) on ITV1.
X Factor Judges' Houses - photo gallery:
Copyright: ITV Thames/Syco