The Ark has announced upcoming concert dates by two performers capable of filling much larger rooms, Keb Mo and Nanci Griffith.

Alt-country favorite Griffith will return to The Ark, Ann Arbor's nationally known nonprofit roots-music club, on March 16. A presale for Ark members at the Premiere level and above takes place next Wednesday and Thursday; tickets go on sale to the general public Dec. 15. Prices were not announced today.

Griffith appeared in Ann Arbor earlier this year as part of the Ann Arbor Folk Festival. She was scheduled to play The Ark in September but had to cancel due to a medical issue.

Modern-bluesman Keb' Mo' will play The Ark on March 22. Tickets, costing $50 or $75, will be available starting at 9 a.m. Saturday in person at the Michigan Union Ticket Office or by phone at 734-763-8587. Online sales will start at 10 a.m. from the Michigan Union Ticket Office.

Keb' Mo' played the Michigan Theater in 2009 in a show presented by The Ark.

Bob Needham is director of entertainment content for AnnArbor.com. Reach him at bobneedham@annarbor.com or 734-623-2541, and follow him on Twitter @bobneedham.