Sthanlee B. Mirador/Shooting Star
01/15/2010 AT 05:00 PM EST
hit up one of her favorite haunts, the Sunset Tower Hotel's Tower Bar for a mostly
ladies' night. The actress sat down for dinner and drinks with four girlfriends and one male pal. "She looked great, really happy and mellow," an onlooker tells us. "They all spent the night laughing, sipping wine and just having a really chill evening."