The proud parents took a night off from son Camden and met up with three other couples at around 8 p.m. at The Stanton Social.
"They looked gorgeous. Everyone was trying to get a peek of them," says a restaurant source.
The couple wore all black and were very affectionate all night.
"Nick had his arm around Vanessa's chair and it looked like they were having a great time," says the source.
And the group had quite the meal. They dined on: potato & goat cheese pierogies, French onion soup dumplings, red snapper tacos, baby spinach salad, kobe beef sliders, celery root ravioli, chicken n' waffles and warm donuts for dessert.
"They were extremely gracious and complimentary to the staff and patrons," says the source.
The Lacheys, however, called it an early night due to Nick's wake up call for his new VH1 show, Big Morning Buzz Live.