Sound the trumpets– or the alarms– Bushwick’s first boutique hotel has opened its doors on 9 Beaver Street, blocks from the JM Flushing stop. BKLYN House (who needs that extraneous “ROO”?), the first hotel from developer Moris Yero Shalmi, sits in the shadow of NYCHA’s Bushwick Houses. It looks a bit like an alien spaceship dropped on a block consisting of quiet one-story warehouses, a public school, and a bodega.