Stepping into Metropolitan Nail Bar is like entering a modish 1960s club. Bright-red retro love-seats groove in the waiting area. Black lights dapple patches of the spa in their electric glow. Cushy camel benches line the walls, with whirlpool tubs below each station. To entertain guests, a flat-screen TV faces a circular chrome bar and blue-light drying station. If posh environs weren’t sufficient to make visitors feel like VIPs, the savvy crew of nail techs augments services with indulgent extras usually reserved for celebrities and presidential guests. Manicures and cocktail-themed pedicures come with hot-towel wraps and massages, and optional add-ons include reflexology and acupressure foot treatments.