Led by Angela Ramirez, Flamenco Por La Vida has become an early-evening staple Saturdays at Crescent Ballroom. The troupe's passionate songs and fiery dancing in Crescent's lounge often top the indie rockers that take the stage in the main room afterward. Each week, Ramirez and her crew don traditional garb — the ladies in traje de flamenco, the men in vests and black slacks — and whirl, spin, clap, and stomp to a fiercely strummed acoustic guitar. The weekly performance has proved so popular that the Crescent has been home to Lluvia Flamenca, a semi-annual festival that finds Ramirez and her group joined by flamenco performers from all over the world.