In the mid-80s, Aris Mardirossian (currently Dan Snyder’s neighbor in Potomac), opened his convenience store named "6-Twelve," based on the worldwide chain 7-Eleven (7,400 stores in North America with hundreds more across the world at the time).
By 1990, his Gaithersburg-based chain grew to 20 stores and there were rumors that he would be purchasing 600 7-Eleven stores in the DMV (the rumors were denied by 7-Eleven executives).
The massive expansion didn't occur, but the chain hasn't disappeared–– there is still one affiliated store in MoCo in Darnestown. The 6-12 (spelled differently) on Snouffer School Rd. is not affiliated with Marrirossian’s 6-Twelve brand.
Owner, Aris Mardirossian, bought the Crown Farm property (Gaithersburg) in the mid-2000s. Part of it later became Downtown Crown and that part was sold in 2015 for just under $163 million. He was also the owner of the popular rt. 355 restaurant, The Flaming Pit.