Margaret Cho's new show is a work in progress, with a mix of new stand-up material but especially live music, including a preview of her forthcoming “comedy music” album, which has the working title of Guitarded and will feature guest appearances from some of pop/rock music’s leading producers, including Patty Griffin, Jon Brion and Grant Lee Phillips. Monday, Sept. 21, at 7 p.m. and 9:30 p.m. Rams Head On Stage, 33 West St., Annapolis. Tickets are $30. Call 410-268-4545 or visit www.ramsheadonstage.com.