The Washington, D.C./Philadelphia Exchange features two companies and two visions representing two cities. Works in the program were choreographed by the companies' artistic directors: Malcolm Shute of D.C.'s Human Landscape Dance and Anne-Marie Mulgrew of Philadelphia's Mulgrew and Dancers Company. Tonight, Saturday, July 9, at 8 p.m., and Sunday, July 10, at 7 p.m. Dance Place, 3225 8th St. NE. Tickets are $22. Call 202-269-1600 or visit danceplace.org.