Rocks Off will celebrate 4/20 with a fitting performance by the Cannabis Cup Band aboard The Temptress this evening. The New York-based promoters’ 5th Annual 4/20 Cruise will board at W. 41st St. at 7 PM and depart at 8 PM. The Cannabis Cup Band sold out a Rocks Off cruise this past weekend. The group got its start in 1996 as the High Times Cannabis Cup house band. The reggae band’s annual Bob Marley Birthday Tribute show, now at New York’s BB King’s in Times Square, has sold out every year since its inception in 1997.