Last night, out in L.A., Nicky Hilton, Amber Rose, and blogger Perez Hilton partied with Allison Melnick as she celebrated the third installment of the Svedka Adult Playground 2033 at Playhouse. The entertainment? Was a little dubious...Guests got to "enjoy" (I'd like to know if they actually did) the debut performance of Gretchen Rossi, from The Real Housewives of the O.C. During her performance there were men in their briefs doing some Cirque du Soleil moves from the ceiling, which really got the crowd going. The applause was a little weak but this guy dangling from a bed sheet was no where near as impressive as Pink's performance at the Grammys.

Following Rossi, who sang her single "Nothing Without You", Nicole Scherzinger belted out "Don't Cha" and some other Pussycat Doll songs. Also in attendance were Sara Paxton and Bridget Marquardt.

The Svedka Adult Playground 2033 hosted by Allison Melnick was the third installment of an event series. The vodka brand has teamed up with the movers and shakers of the nightlife. In addition to Melnick, in L.A. Brent Bolthouse (Hyde, Area, and Foxhouse), and New York's Richie Akiva and Scott Sartiano (Butter Restaurant and 1 Oak) have hosted these Svedka celebrations. The final party will be in New York with Eugene Remm and Mark Birnbaum (Tenjune, Abe & Arthur's, SL among others).

Here's the video of Gretchen's debut...but watch at your own risk.

.
Nicole Scherzinger                          Gretchen Rossi

Perez Hilton, Nicol Scherzinger                Bridget Marquardt

[Images via Wire Image and Perez Hilton]