Tribeca is an upscale neighborhood known for high-end real estate and well-heeled residents — a downtown haven for European cars and pedigreed dogs. It’s also a truly gorgeous area that mixes glorious old cast-iron lofts, wide cobblestone streets, and dramatic new buildings. Decades ago, these lofts housed artists and squatters. But the bohemians have given way to cool-seekers with bigger bank accounts. Now, this neighborhood is among the most expensive places to live in the city. That hasn’t cost the neighborhood much of its sophistication, though. Nightlife in Tribeca remains busy but refined, attracting a cosmopolitan crowd with an appreciation for the finer things in life.