Two women left clubbers shocked after they jumped up on stage and stripped naked - 'for the chance to win an old iphone.
The ladies - one of who was reported to be married - whipped off their clothes and gyrated in front of stunned guests.
At one point the compere snatched away the knickers of one of the contestants as she tried to cover her modesty, instead throwing them into the crowd.
As she turns around to face the other way she wiggles her bottom to the music and is joined on stage by a second woman.
The bizarre dance contest took place in the city of Berezniki in central Russia's Perm Krai region with an iPhone 5s reportedly being offered as a prize.
But their amateur dancing, which was uploaded onto social media, did not go down well with the online community.