DCist cannot tell a lie. We were more than a little disappointed (although somewhat elated as we had yet to purchase tickets) to hear that Andre Agassi has withdrawn from this year’s Legg Mason Tennis Classic to better focus on the upcoming US Open. Agassi, a five time champion of the event, won his first tournament of the year last weekend in Los Angeles and opted to take this week off, lest his back…

Catherine Andrews contributed to these picks FRIDAY: >> Okay, so it’s not quite as groovy as the sing-along versions that swept the country over the last few years, but if you’re looking for something a little bit fun and a whole lot wholesome tonight, you could do worse than the National Symphony Orchestra accompanying “The Wizard of Oz” on the lawn at the Wolf Trap. 8:30 p.m., $18 to $38. SATURDAY: >> Chopteeth, a…