05/12/2011 AT 12:00 PM EDT
celebrated the '80s during a theme party at Trousdale Lounge
in L.A., where the actor chatted up everyone, including Chace Crawford
, Jessica Szohr
and Emma Roberts
. Lutz had a drink in his hand the whole time, while a flirty Crawford chatted up Roberts and checked out the partygoers' '80s getups. Meanwhile, Szohr kept the drinks flowing, ordering shots for a few clubgoers.