A plate of frisee, endive, house cured pancetta, potato crouton...

A plate of frisee, endive, house cured pancetta, potato crouton and poached egg is called District Salad and is served at The Riverhead Project, on East Main Street in Riverhead. The restaurant is housed in what was once a Chase Manhattan Bank. Owner Dennis McDermott took on this project to create an upscale restaurant using fine local ingredients. (June 15, 2011) Credit: Randee Daddona

Even in a 24/7 world, there's still noon to 3 p.m. The business lunch may be trimmer, its pace faster, and three martinis rare. But a lot of what the IRS terms "the active conduct of business," with half the expense deductible, continues at tables large and small across post-recession Long Island. Here's a sampler of restaurants in five Nassau-Suffolk hubs, where you can seal the deal. --PETER M. GIANOTTI
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