At 36, Seattleite and dancer Savannah Fuentes has spent half her life studying flamenco. “Flamenco is a lifelong commitment,” she says. “It’s hard. It’s really hard.” Fuentes brings her show “El Sol de Medianoche, Flamenco en Vivo” to Cozmic 8 pm Monday, Feb. 24; $20 general, $10 students, $7 kids 12 and under. The Spanish dance is unique, Fuentes says, because while other Latin dances — salsa, tango — are social or with a partner, flamenco is mostly for soloists, and the footwork is particularly complex.