Where to go at 5:30am in Barcelona after an already-full evening at Sonar By Night? Back to Placa Reial, where a lone guitarist has set himself up on the fountain, and has gathered a half-dozen wannabe flamenco singers around him. Cans of Estrella Damm: 1 Euro. Watching the sun come up while singing "La Bamba" with a bunch of beautiful strangers: Priceless.