He was a sweaty, long-haired blur running past us from the Bunkhouse floor, where his bandmates continued playing, straight into the women’s restroom at the back of the bar. When Ami Shalev, frontman for Israeli heavy-rock trio Monotonix, re-emerged, he held aloft a trash can full of used paper towels—and God knows what else. Moments later, he dumped the nasty contents over the head of his drummer, who gleefully continued bashing away. It was the highlight of a wonderfully unruly set that also saw Shalev dump cocktails down his pants, climb atop seated patrons and, ultimately, pull his two bandmates—and their instruments—atop a narrow half-wall, a perch from which they closed out their riotous Saturday night.