The weekend’s conclusion can be a bummer. However, Purples’s latest release “It’s a Drag” with a blend of rumbling bass, snappy percussion and spirited vocals helps to break loose from the doldrums. By the time that gnarly guitar inferno of a solo is ablaze, the tides have turned. You can catch the band on a bill with Matthew Friedberger on Thursday, October 8 at Boot & Saddle.