"Church of the Passionate Cat." It’s a detective who-done-it story turned on its ear, with the feel of film noir doused with a little metaphysical mystery. Underbelly Theatre joins with the award-winning Rude Mechs to present a new play that finds down-and-out detective Molly Maguire investigating the nature of life itself. 8 p.m. Thursdays-Sundays, 8 p.m. and 10 p.m. Saturdays. Off Center, 2211 Hidalgo St. $10-$15. www.rudemechs.com
"Southwest Voices." Chorus Austin Vocal Arts Ensemble sings works by Austin-area composers including Donald Grantham’s new piece "Let Evening Come," Craig Hella Johnson’s "Psalm of Life," Abby Gostein’s "Vayarotz Likratam" and three works by Trevor Shaw based on poems by William Blake. Pieces by Chorus Austin’s own Stephanie K. Andrews, "Ave Maria," and Benjamin May, "From the Heart of God," are also featured along with the group’s inaugural Young Composers Competition, "A Prep-School Boy," by Joshua Fishbein. 8 p.m. Saturday at St. Theresa Catholic Church, 4311 Small Drive. 3 p.m. May 18 at St. Martin’s Evangelical Lutheran Church, 606 W. 15th St. $15-$20. 512-719-3300, www.chorusaustin.org
"Love Songs from Italy." In Georgetown and Austin, chamber choir Ensemble VIII sings repertoire from composers Claudio Monteverdi, Alessandro Scarlatti, Giovanni Giacomo Gastoldi and Philippe Verdelot, among others. 7 p.m. Friday at First United Methodist Church, 410 E. University Ave., Georgetown, and 3 p.m. Saturday at St. Louis Catholic Church Chapel, 7601 Burnet Road. $10-$45. www.ensembleviii.org/tickets.