$10 admission. $5 with student ID. An alum of Weather Report and the bands of McCoy Tyner, Joe Henderson, Freddie Hubbard, Blue Mitchell and others, Eric Kamau Gravatt essentially has had two careers in jazz with a couple decades of separation. Like John Coltrane and long-time associate McCoy Tyner, he is a native of Philadelphia. Originally a conga player, Gravatt taught percussion and music in Philadelphia and Washington, DC in the 1960s. Miles Davis invited him to join his band,…