It is difficult to believe that Alvin Ailey's extraordinary company is celebrating its 65th anniversary. This year, with a combination of new work and old favourites, it brings four different shows to London: Contemporary Voices , Modern Masters , Ailey Classics and 21st Century Creations . The first three programmes include Alvin Ailey's unforgettable choreography of "Revelations." Almost inevitably for us, this was the highlight of the Contemporary Voices program. Ailey's ability to capture the longing and exuberance of such spirituals as "Didn't My Lord Deliver Daniel," "Sinner Man," and "Rocka My Soul in the Bosom of Abraham" remains both enthralling and inspirational. It's an almost impossible act to follow, and for all three programmes, in which has been included, it has wisely been selected as the concluding piece. For us, the opening , Kyle Abraham's "Are You in Your Feelings," has some engaging and ext