Zac Posen's Western Adventure

Call it an early birthday party. Just hours shy of ringing in his 29th, Zac Posen took a break from back-to-back sales appointments, a client brunch and trunk show at Neiman’s in Beverly Hills, to hold an impromptu fête and fashion show at Bar Marmont. In between showing off the Spring 2010 collection—applause was especially heavy for look 36—Posen caught up with his L.A.-based friends like Rosson Crow (pictured at left with Posen), the Like’s Tennessee Thomas,