Hope Boykin and Jeroboam Bozeman , a couple of high-flying folks from the Alvin Ailey dance company, were at the Henderson Inclusion Elementary School in Dorchester the other day demonstrating some of their signature moves for the kiddos. . . . Meanwhile, Michael Bivins of New Edition and Bell Biv DaVoe was the keynote speaker at the annual Martin Luther King Jr. Breakfast at the YMCA of Greater Boston in Roxbury.