Songwriter Langhorne Slim (born Sean Scolnick) and his band, the Law, return to the Pour House this weekend with a twangy variety of folk/blues/Americana tunes. After graduating from the Conservatory of Music at Purchase College (near N.Y.C.), Slim started playing open mic events, coffeehouse gigs, and solo shows. He buddied up to the Trachtenburg Family Slideshow Players and started touring with them as an opening act. Kemado Records signed him up in 2008. Slim’s latest collection, Be Set Free, earned rave reviews for its cleverly orchestrated instrumentation (extra strings, horns, percussion, etc.) and poetic lyrics. Slim recently settled in Portland, Ore., where he’s been working on a new album. He and his bandmates — drummer Malachi DeLorenzo, bassist Jeff Ratner, and keyboardist/banjo player David Moore — headline. Matrimony opens at 10 p.m. Electronic/jazz-fusion act Key of Q plays the deck at 5 p.m.