Robyn Gilliam is the Joey Ramone of Nashville hair stylists, a rip-kneed punk rocker who has wound up tending some of the city’s highest-profile coifs. Settle into her chair, at KDK World Design in Cummins Station, and let her tell you how the Runaways initiated her into a lifelong love of three-chord fury and dangerous threads. Then she’ll turn her cherry-bomb eye to your tousled, tangled, mistreated mop, the raw material of her art awaiting transformation. “I dreamed last night about cutting your hair,” she once said to a startled customer. An hour later he left a believer. After getting the direct beam of her undivided attention, a guy’s hair feels like a houseplant in a window-square of sunlight. Her only agenda is that you leave her care looking cool. Of gratitude are crushes made.