Grant's Tomb is the setting for live jazz every Wednesday this summer starting July 8. Harlem is home to many free outdoor jazz concerts every summer, but there's one that stands out: Jazzmobile's Summerfest series at Grant's Tomb and Marcus Garvey Park. And it kicks off this week. The venerable Harlem-based jazz organization begins its season of outdoor concerts with a perfomance featuring drummer Winard Harper on the steps of the iconic General Grant National Memorial on Ri