Saratoga Springs, N.Y., three-piece Candy Ambulance are living examples of the rock-and-roll lifestyle. Loud guitars? Check. Near-naked live performances? Check. Songs about errant hand jobs, steamy trysts and weeklong benders? Check, check, check. But a glimmer of vulnerability appears beneath the band’s cocksure façade of sex, drugs and late-night chaos. Dynamic choices, such as frequent shifts in tempo and explosive choruses, imply personal volatility and vulnerability. Singer and guitarist Caitlin Barker furthers the dichotomy with her casual inflection and emotional resilience. Catch Candy Ambulance on Sunday, November 19, at the Monkey House in Winooski. Rooftop Love Club open.