Chicago has become the American capital of improvisational jazz, and groups like DKV Trio prove why. This formidable unit of drummer Hamid Drake, reeds player Ken Vandermark, and bassist Kent Kessler summons pieces that brood with a coiled intensity and snake with graceful unpredictability. With a quarter century of performing experience, DKV Trio operate with a dazzling telepathy. It makes perfect sense that they’ll be playing the Royal Room, Seattle’s most accommodating venue for adventurous jazz. by Dave Segal