In the late '80s, Indigo Girls Amy Ray and Emily Saliers achieved college radio fame for their intricate harmonies and passionate folk anthems. At the turn of the decade, they followed fellow female songwriting acts like Tracy Chapman and 10,000 Maniacs into the mainstream.
Though Ray and Saliers are perhaps best-known for their singing voices, the Indigo Girls have backed various political, environmental, and humanitarian causes as well. A section of their website is dedicated to informing fans on the best ways to act on current issues like Haiti relief, Gulf Coast recovery, and various gay rights actions like the Hate Crimes Prevention Act.
This past December, the Girls released a bluegrass-tinged holiday album called Holly Happy Days, a project aimed to bring multidenominational holiday joy. That record came on the heels of last year's Staring Down the Brilliant Dream, a double live album that includes material spanning their entire career, and their show at Culture Room is likely to do that as well.