D.C.’s retro-inspired nightclub Soundcheck (1420 K Street NW) celebrated its one-year anniversary on Thursday, August 25 with a host of Washingtonians, VIPs and media in attendance. More than 150 guests enjoyed drinks during a complimentary two-hour open bar and rocked out to tunes by Dutch house DJ and producer Fedde Le Grand. Since opening in August 2015, the intimate nightclub has attracted high-caliber …