Ten years ago, three brothers just out of college ambled down from New Jersey to Vienna and invested in a coffee and music business. They inherited a coffee bar, a stage, instruments for sale hanging on the walls, a recording studio and an upstairs area for music lessons. Taking advantage of the premises and their passion for music, Daniel, Jonathan and Luke Brindley turned their 200-seat strip mall cafe into Jammin Java, named one of D.C.’s best music venues. How did they do it?