Pacific Empire Chorus is an award-winning chorus and music group based in Petaluma. The a cappella chorus is made up of female performers who sing a variety of pop, rock, and jazz songs. Each year, the chorus competes in the Region 12 chorus competition which is usually held in Northern California or Nevada. Pacific Empire is affiliated with Sweet Adelines International, a nonprofit organization of choruses and quartets around the country. Rehearsals are held on Wednesdays and are open to the public.