08/10/2012 at 06:00 AM EDT
No trouble here! Lindsay Lohan
spent a relatively quiet night out with pals at West Hollywood's Bootsy Bellows on Tuesday. The actress – wearing denim short-shorts, a black tank and crystal-studded vest – settled into a banquette in the back VIP room around 1:30 a.m., chatting away with a select group of friends.
According to an onlooker, "Lindsay seemed really mellow and like she just wanted to chill out." In fact, no one else in the hotspot seemed to realize she was there.
At one point in the evening, Lohan turned to face the mirrored wall and reapply her lip gloss. And she did take a break from chatting to watch the lounge's marionette puppets in action. But by 2:30 a.m., the starlet called it a night, grabbing her red Birkin bag and camera and slipping out.