Courteney Cox and David Arquette Share a ‘Cordial’ Lunch

Courteney Cox and David Arquette

Jordan Strauss/WireImage

12/01/2010 AT 11:45 AM ET

Though they reunited for a family bowling outing in November, on Monday, it was all business for Courteney Cox and David Arquette as they lunched together with three associates at Morton’s the Steakhouse in Burbank. They arrived and left separately, though Arquette kissed his estranged wife on the cheek when she entered the restaurant. “They were very cordial and friendly,” an onlooker tells PEOPLE.

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