Ellen Serber led the West Marin gathering of a nationwide tribute to B. K. S. Iyengar—an influential yoga teacher who authored the 1966 “Light on Yoga” and died last week at age 95—at Chicken Ranch Beach on Tuesday. Practitioners performed a series of asanas, then sat for several minutes. Ms. Serber, who studied with Mr. Iyengar, teaches on Mondays at the Dance Palace. David Briggs