Amanda Bynes REJECTED from Hotel Bar ... Hours After DUI Arrest

Hours after Amanda Bynes was arrested for DUI ... the actress returned to the scene of the crime to continue partying at a Hollywood bar ... but TMZ has learned staffers REFUSED to let her inside.

Multiple sources tell us ... Bynes and some friends tried to enter the hotel bar at The Standard Hotel on Sunset Blvd. on Friday night ... but the doorman refused to let the actress inside.

We're told hotel staff members were aware Bynes had been drinking at the nightclub at The Standard on Thursday evening ... hours before her DUI arrest ... and didn't want to be associated with the actress in case she pulled a repeat performance.

Sources say Bynes and her friends left the hotel without incident.

As we previously reported, Bynes was popped in West Hollywood around 3 AM Friday morning after she allegedly clipped a cop car. She was released on $5,000 bail.

Calls to Amanda's rep have not been returned.