10/21/2012 AT 2:00 PM ET
The Hills are alive with the sound of club music!
Heidi Montag and Spencer Pratt celebrated the three year anniversary of Crazy Horse III Gentlemen’s Club in Las Vegas on Friday night.
Montag – who hosted the event – arrived wearing skin-tight black leather shorts and a see-through black top.
Joined by husband Pratt, the former Hills costars sat at a VIP table where they toasted with Dom Perignon Champagne and Patrén shots.
“Heidi came to the club with a mission – to get her first ever lap dance!” an onlooker tells PEOPLE. “Heidi selected two bombshell dancers and she showered them in $1 bills.”
– Melody Chiu
— People magazine (@peoplemag) August 7, 2012