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It seems obvious now that a thoughtful online program on music from all genres would find a regular and loving audience, but at the turn of the century it wasn’t a sure thing. Heck, podcasts didn’t even exist when All Songs Considered launched in January 2000. Now the show, which has expanded from a weekly chat to include live concert recordings and an online music channel, is ready to celebrate 16 years. All Songs helped transform NPR Music into one of the premiere destinations for music fans; stopping by NPR HQ to play a Tiny Desk Concert is now something that musicians include on their bucket lists. Over the years, hosts Bob Boilen and Robin Hilton have also been big boosters for the local music scene. The pair will host an evening of festivities at the 9:30 Club featuring the experimental electronic dance music of Baltimore’s Dan Deacon and the unmistakeable, haunting voice of Sharon Van Etten. That alone would be a stacked lineup, but Boilen and Hilton have made so many friends over the years that plenty of surprise guests are expected to drop by. Dan Deacon performs with Sharon Van Etten and special guests at 7 p.m. at the 9:30 Club, 815 V St. NW. $20. (202) 265-0930. 930.com.