The couple didn't seem to want to miss a chance to spend their final night out together before they become parents, reported Ace Showbiz.
"She is close (to giving birth). She was drinking water and staying hydrated and was very, very pleasant with everyone. Super sweet and charming," a source said.
The insider added that Biel and Timberlake, 34, "stayed together the whole night. He was very protective of her in that way. It was really nice to have them here."
Just three weeks ago, Timberlake wished his wife a happy birthday on his Instagram account.
So far, the gender of their baby is still unknown as they opted not to find it out before the baby's born.