For an electro-pop pixie from Sweden, the low 60s temperatures that seized Miami Beach on Friday night must have felt like home. But in this region, such frigid conditions tend to spook the thin-skinned hipsters. It's their loss. Because in the first show on her North American tour, Robyn gave her hardcore fans a hurricane performance. That fan base was awfully rowdy. With the first few notes of "Fembot," the gyrating contingent turned the Miami Beach Fillmore's orchestra pit into a sweaty mess. Still, they couldn't keep pace with Robyn herself.