06/13/2012 AT 5:55 AM ET
Making her way to the Los Angeles County Museum of Art (LACMA) on Friday, Diaz and her group popped into their eatery, Ray’s and Stark Bar.
“Cameron was with a few other women and a young boy,” an onlooker tells PEOPLE of Diaz’s trip to the Mediterranean-inspired restaurant, where she and her guests dug into salads. The onlooker adds, “She was very friendly” during her visit.
– Dahvi Shira