This weekend: Mark Olson and Gary Louris, Thievery Corporation

Touring in support of “Ready for the Flood,” their first album together since Mark Olson parted ways with his mate Gary Louris in the cult-favorite alternative-country band the Jayhawks in 1995, the reunited duo comes to the Park West, 322 W. Armitage, at 8:30 p.m. Friday, Feb. 20, with an opening act, the Autumn Defense, boasting another pair of musicians every bit as revered. (The group is the side project of Wilco’s John Stirratt and Pat Sansone.) Tickets are $25 through www.Ticketmaster.com, or minus the service fees at the club’s box office, (773) 929-5959.

You know a band is moving up the ladder big-time when a show is moved from the Riviera Theatre to the Aragon Ballroom. Thievery Corporation, the Washington, D.C.-based duo of duo consisting of Rob Garza and Eric Hilton, are winning justly deserved acclaim for their electrifying mix of acid jazz, dub reggae and numerous groovy World beats, and they take the storied stage at 1106 W. Lawrence at 9 p.m. Friday, Feb. 20. Tickets originally purchased for the Riv show will be honored, and others are available for $41 through www.Ticketmaster.com, (312) 559-1212.