Tonight, Underground Ibiza presents: Willie Graff, Don Juanito and Kevin Cook! 22/08/2015 by Ibiza Link, posted in ibiza by night Tonight 22nd of August Underground Ibiza, the cult club of San Rafael, presents: Willie Graff, Don Juanito and Kevin Cook! Here you have the official poster. If you want to spend a night with pure underground music, that’s the place.