Teens at last year’s OFTC Block Party. Saturday, Aug. 25. 4-10 p.m., at the Old Firehouse Teen Center, 1440 Chain Bridge Road, McLean. McLean Teens Got Talent is looking for a few young artists from Fairfax County in 7th-12th grade to participate in the Teens Got Talent show during the OFTC Block Party. Free. Advance registration is required. For more information, call 703-448-8336 or go to www.mcleancenter.org.