You need to make a reservation for L'Artusi years in advance... or at least the week before, if you try a walk-in then ask to be seated at the bar, as always in New York that is the best seats at any of my favorites restaurants.
This is tres chic, quite the upper West side suite & puddle scene! The pro tip is sitting in the bar, they have amazing bar snacks, drinks and wine menu is a blast, and I can't think of a better way to end a successful shopping spree then drinks and dinner at Nougatine At Jean-Georges (at the bar)