September 09, 2015 10:58 AM

Steve Granitz/WireImage; Douglas Stratton

The honeymoon may be over, but Jennifer Aniston is still finding cause for celebration.

On Tuesday night, Aniston stepped out for a casual sushi dinner with five girlfriends at Umi, a contemporary Japanese restaurant in Atlanta.

RELATED: Jen and Justin’s Honeymoon: All About Their Luxurious Bora Bora Resort

A source at the restaurant tells PEOPLE that Aniston, who wore her glasses on her head, “looked super casual and relaxed” and did not opt for any special treatment she and her friends sat in the main dining area right near the bar.

“She was super cute and definitely enjoying herself and her meal,” the source said, noting that she sipped on a martini and ate her sushi with her hands (which many culinary experts believe is the proper way).

RELATED: Jennifer Aniston Dines on Pizza and Pasta with Friends in Atlanta

Since returning from her romantic Bora Bora honeymoon, Aniston has been making the culinary rounds. On Saturday, the actress and Justin Theroux were spotted on a double dinner date with Sandra Bullock and her new boyfriend, Bryan Randall, at Bullock’s restaurant, Bess Bistro, in Austin.

—Maria Yagoda with reporting from Elissa Rosen

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