Chances are you’ve already seen or heard the Robbers on High Street but just don’t know it. The band has been through D.C. a handful of times in the last two years, supporting artists like Fountains of Wayne, The Sleepy Jackson, Ambulance LTD and VHS or Beta. They’ve been the house band on Last Call With Carson Daly and also had songs featured on The Wedding Crashers Soundtrack as well as Six Feet Under…