Dee Perry makes a move with the Alvin Ailey American Dance Theater as she previews the company's 50th anniversaryperformance onstage at PlayhouseSquare. Plus, local blues man Colin Dussaultcelebrates 20 years of making music with a gig at the Savannah Bar and Grille. And we preview the sold-out concert by award-winning children's musician Justin Robertswith a spotlight on music from his new CD Pop Fly.