In front of L'industrie Pizzeria, as at many other New York restaurants and shops, customers line up behind barriers -- in this case, all to grab a prized pizza slice.

In front of L'industrie Pizzeria, as at many other New York restaurants and shops, customers line up behind barriers -- in this case, all to grab a prized pizza slice.

In the US’ biggest city, queuing at the latest hotspots ‘signals taste, knowledge and stamina’, an academic says.