Run River North and ‘Always Patsy Cline’ highlight weekend performances By Denny Dyroff, Staff Writer, The Times Singer-Songwriter Dar Williams performs July 27 at the Bryn Mawr Gazebo as part of the Bryn Mawr Twilight Concerts. Dar Williams, who will be performing at 7 p.m. on July 27 at the Bryn Mawr Gazebo as part of the Bryn Mawr Twilight Concerts series (9 South Bryn Mawr Avenue,...