yo my wife is from santiago chile with folks in vina del mar. that is the trendy spot so i dont think you will find any techno there....
"sasha sasha sasha" is the mantra there i believe but i could be wrong.... you never know....
i just did a radio show for daniela haverbeck down there... she is the only person i know down there who even plays hard stuff.
but don't expect and you won't get dissapointed... better just to enjoy the outdoors and watch the snobs go by haha
gj