Terrapin Crossroads’ fifth anniversary celebration got off to a bangin’ start as Bob Weir made a surprise appearance with old mate Phil Lesh and the Terrapin Family Band to play an intimate show in the bar at Crossroads. While extensive video of the gig is still forthcoming, a few tunes have surfaced on YouTube including Weir, Lesh and Nicki Bluhm rolling through “The Music Never Stopped” as…