PORT TOWNSEND — The Westerlies and Gravitas Quartets in Concert will be at 7:30 p.m. Monday at the Quimper Unitarian Universalist Fellowship Sanctuary.

Doors will open at 7 p.m. at the sanctuary at 2333 San Juan Ave., Port Townsend.

General admission is $40 for the three-hour concert. Tickets are available at https://www.eventbrite.com/e/the-westerlies-and-the-gravitas-quartet-tickets-633718919347?aff=ebdssbcategorybrowse

The Gravitas Quartet, led by pianist/composer Wayne Horvitz, explores the intersection of chamber music and improvisation, organizers said.

“Horvitz’s wide-ranging compositions provide a platform for untethered improvisations woven together by the dynamic ensemble interplay of four master practitioners: Wayne Horvitz (piano), Peggy Lee (cello), Sara Schoenbeck (bassoon), and Riley Mulherkar (trumpet),” organizers said.

The Westerlies, “an arty quartet…mixing ideas from jazz, new classical, and Appalachian folk,” according to the New York Times, are a New York-based brass quartet comprised of childhood friends from Seattle: Riley Mulherkar and Chloe Rowlands on trumpet, and Andy Clausen and Willem de Koch on trombone.

“From Carnegie Hall to Coachella, The Westerlies navigate a wide array of venues and projects with the precision of a string quartet, the audacity of a rock band, and the charm of a family sing-along,” organizers said.

Formed in 2011, the self-described “accidental brass quartet” takes its name from the prevailing winds that travel from the West to the East.

”The Westerlies explore jazz, roots, and chamber music influences to create the rarest of hybrids: music that is both folk-like and composerly, lovely and intellectually rigorous,” according to NPR Music.