Switchback, the musical duo of Brian Fitzgerald and Marty McCormack, will entertain with Irish music at 6:30 p.m. June 20, on the upper terrace of King-Bruwaert House, 6101 S. County Line Road, Burr Ridge. Bring lawn chairs for seating. To RSVP, call (630) 230-9521. In the event of rain, the concert will be canceled.