04/16/2012 at 12:00 PM EDT
just can't get a break behind the wheel.
Despite the scrutiny she's faced since her DUI arrest
on April 6 (not to mention another small driving mishap
), the beleaguered star
went out on the town again in West Hollywood Sunday night, and attracted plenty of attention for her driving.
Around 10:30 p.m., Bynes, 26, was spotted "holding up traffic and doing an incredibly slow ... 3-point turn in the middle of Robertson [Blvd.]," an eyewitness tells PEOPLE of the incident on the major thoroughfare.
"It was taking forever and she finally made it into the driveway," the eyewitness adds. "She looked wobbly – I guess it could have been the heels since she was wearing sky-high nude pumps, but she did seem out of it."
After neglecting to pay the valet (who had to chase her down for the $8 charge), Bynes, who looked quite thin according to the witness, and a male friend went into SUR restaurant and bar.
The actress also took part in last week's Coachella activities. A source tells PEOPLE she showed up at Nylon
's Voli vodka-sponsored Coachella party on Saturday.
With reporting by DAHVI SHIRA