Modern dance usually takes center stage in this Moorish dome-topped performing arts palace. The companies of Merce Cunningham, Martha Graham, Paul Taylor, Alvin Ailey, Twyla Tharp, the Dance Theatre of Harlem, and the American Ballet Theatre are often on the calendar. Don't expect cutting edge -- but do expect excellence. Sight lines are terrific from all corners, and a new acoustical shell means the sound is pitch-perfect.