Anyone who likes house music knows that this is the weekend to be in Ibiza. The island reverts back to what it was once upon a time—la isla magica—hippy islanders, empty shores, none of the August crowds. It’s the last chance for a swim, a tan, and for Circoloco. Last year every tech-house D.J. in the industry was there: The Martinez Brothers, Peggy Gou, Seth Troxler, Damian Lazarus (need we list them all?!). For edition XXI this year, who knows what other tricks Circoloco will pull out of its hat. —E.C.