Reynolds, 38, and the 27-year-old actress are regulars at the farm-to-table restaurant, reported People magazine.
"The two sat side-by-side at an L-shaped banquet table in the main dining room where they were super lovey dovey," an onlooker said.
Both were dressed casually - Reynolds was sporting a T-shirt and newsboy cap, while Lively, 27, donned a scarf and a fitting attire.