Mischa Barton has reportedly pulled out of co-hosting the opening of a Las Vegas nightclub, just days after she was arrested for driving under the influence (DUI). The former television actress was pulled over by West Hollywood cops in the early hours of Thursday morning when she was spotted straddling two lanes of traffic. She was taken into custody on suspicion of DUI, but was also booked for possession of narcotics and driving with a suspended license. Following her arrest, Barton has cancelled an appearance at the opening of Cathouse at the Luxor hotel on Saturday tonight. A source tells New York Post gossip column PageSix, "Mischa can’t give interviews on the red carpet or deal with the press right now, so they told her she can’t do the event." Barton is currently free on $10,000 bail.