Friday, March 24 Artomatic – 12 p.m. Join over 600 visual artists, musicians, filmmakers, and performers in Crystal City for the annual one-of-a-kind art extravaganza. For more details, click here. The event is located at 1800 Bell St., Arlington, VA.   Flashpoint Gallery – 6 p.m. to 8 p.m. In Developing an Argument, Christian Benefiel…