Japandroids at Pianos (07/11/09) Photo: G! DOWNLOAD: Japandroids – “Heart Sweats” Vancouver’s Japandroids (Brian King and David Prowse) played two pre-Siren shows in New York last week (Jul 10 at Cameo Gallery & Jul 11 at Pianos) and they’re back again this Saturday to play the Main Stage at the Siren Music Festival. Slim Twig…