Concertgoers dance to the Salsa music of Opa Opa during City of Santa Monica's 3rd Annual Jazz on the Lawn in front of City Hall on Sunday, Aug. 31, 2008. OPA OPA is made up of a diverse group of musicians. They come from all around the world and each adds their own special flare and flavor to the band’s sound. They performed Latin Salsa, Cumbia, Bolero, Cha-Cha and Merengue The concert was the final installment in the summer jazz series.