To hear these guys smoke through a number on Tuesday nights is to infuse your life with a sudden dash of Fifties cool. You'll walk away feeling sharper. You'll want to crease your trousers and wear shades inside. Eddie Higgins's fingers float over the keyboard like darting minnows in a tide pool. Gilly DiBenedetto summons mesmerizingly fluid tones from his sax. And Wilner sets the foundation for it all with his upright bass. Half an hour or so into the set, Tony Fernandez's gilded pipes warble Frank Sinatra tunes with such effortless grace, you'd think you had just stepped off the set of Ocean's Eleven. Master violinist Federico Britos ignites his strings. Depending on the night Lenny Steinberg or James Martin will be tapping the drums. Put a boutonniere in your lapel, snap your fingers, and order a martini. One word to the wise: Higgins, who has recorded with the likes of Stan Getz and Dizzy Gillespie, spends his summers on Cape Cod. But fret not: He returns in the fall.