PERFORMANCE VENUES are typically known for what's inside, but a new theater in suburban Washington, D.C, demonstrates that what's on the outside also counts. Capital One Hall, a high-end corporate event and performing arts center in Tysons, Va., just a few miles west of Washington, is topped by a sprawling landscaped public park and wrapped in a signature sawtooth marble and glass facade. The new venue, which opened this past October, houses a 1,600-seat main theater, a 225-seat black box theater, and a large atrium. As part of the larger Capital One Center development, it shares a block-along with a parking and loading-dock facility-with a grocery store and hotel tower. In addition to Broadway shows, concerts, and other entertainment acts, it hosts an extensive series of local arts groups through a partnership with ArtsFairfax, giving up-and-coming performers a world-class stage on which to showcase their talents.