06/13/2012 at 05:55 AM EDT
A week after helping BFF Drew Barrymore
celebrate her wedding
with Will Kopelman, Cameron Diaz
was spotted out with some different friends – for a much more low-key affair.
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