Upon entering Chef Luigi Diotaiuti's cozy Dupont restaurant Al Tiramisu, you're greeted by a wall of framed celebrity pics. From Hillary Clinton to Wolf Blitzer to Harrison Ford (who would've thought that of those three, Ford is the only one to become president),Luigi has hosted Hollywood celebrities and Hill icons alike in 16 years of operation. His philosophy is to treat high-profile guests like any other--whether that's bantering at the bar over a soccer game or setting aside a private corner for a special birthday. He also ensures that the stars aren't disturbed during their meal--photographers are not allowed inside, and the staff doesn't allow other guests to approach the celebs. Unless, of course, they're invited to do so.

Dupont's new Russian restaurant,Mari Vanna,also plays host to celebrities, though it's generally a younger crowd (think Alex Ovechkin and Taraji P. Henson, above) looking for less of an intimate Italian-grandmother's-living room experience and more of a trendy members-only party vibe. However, despite the starkly different ambiance and clientele, Mari Vanna's approach is very similar. Owner Tatiana Brunetti tells us that it too focuses on making celebs feel like any other guest. "We want them to feel like they can relax and invite friends." They also forbid entry to photographers and will provide a private room or isolated corner table when necessary.

Want to nominate a restaurant for our Old Guard series? Email Alia.Khan@bisnow.com.