Paul Sevigny, the paradigm of New York nightlife, chose The Roxy to house his beloved late night destination, Paul’s Cocktail Lounge. Facing 6th Avenue, Paul’s is an intimate space serving crafted cocktails on polished silver trays. The staff sports Latin Palm Beach-inspired uniforms by Paul’s sister and fashion icon Chloe Sevigny. Hand-painted hibiscus wallpaper, patterned mirrors and marble that meet with splashes of emerald and raspberry, and tropical art by New York painter Josh Smith would make Dorothy Draper proud. A rotating cast of NYC’s renowned DJs and music talents spin, along with international guest appearances. Could this be (another) new Beatrice Inn? Since being silenced by griping neighbors in 2009, Paul Sevigny’s fashionable West Village bar has been endlessly imitated: Pyongyang door policies, shabby chic furniture, swirls of celebrities and downtown dirtbags. Paul’s Baby Grand, his first solo offering since Beatrice closed, has rejiggered an auxiliary space at the Tribeca Grand hotel into a lounge-like spiritual successor (albeit a smaller and less decadent incarnation). “People have been taking themselves much too seriously in night life,” said Mr. Sevigny, who hosted private events at Baby Grand during New York Fashion Week, before opening publicly in mid-October. “Design and cocktail-crafting don’t necessarily have to reflect on your inner soul. It’s about fun and entertainment.” THE PLACE Baby Grand has a separate entrance along the hotel’s western flank. A narrow corridor stovepipes visitors toward a 1,000-square-foot den with foliage-print wallpaper, tropical paintings by Josh Smith and waiters in floral aprons. “There was a lot of thought in trying to keep this extremely feminine to alienate groups of guys,” Mr. Sevigny said. Still, one could imagine Michael Corleone giving Fredo a New Year’s Eve kiss of death here, instead of in Havana. THE CROWD Ritzy without being stodgy: angular blazers and fluffy ostrich coats coexist with beaten leather jackets and stocking caps. Johan Lindeberg, Waris Ahluwalia and Roitfeld-ian critters from the nexus of night life and fashion are regulars. On dance-friendly evenings, staff members ease a ladder past an obstacle course of mismatched couches and coffee tables to affix a disco ball to the ceiling above the swaying crowd. THE PLAYLIST Carbonated brew of new wave, classics and soul (think Stevie Wonder, Laid Back and Talking Heads). D.J.s like Cassidy and Max Glazer have dropped by to spin. GETTING IN Tidy capacity (around 120) and a fresh-faced doorman make this an unwise destination for hopefuls out of the loop. “My dream customer is a 75-year-old gay, black European,” Mr. Sevigny said. “He’s checked off every box that can get you in.”