While Robin Thicke’s lovely wife, Paula Patton, was filming her guest role on “Law & Order: Special Victims Unit” at the Empire Hotel on Monday, the singer had domestic chores to do. A source tells us Thicke was in the upper West Side hotel’s Lobby Bar, interviewing nannies for the couple’s 4-month old son, Julian Fuego. Don’t put those résumés away just yet, ladies and gentle-mannies: There’s no word if any of the “handful” of aspiring caregivers won over the “Sex Therapy” crooner.