M&R Grocery on Columbia Pike appears to have shut down. The front windows have been covered in paper and there is no sign on the door suggesting that it is temporary.
I suppose it was convenient while the Giant is being rebuilt, but the prices were fairly high, the produce quality mediocre, and it lacked much in the way of interesting products (e.g. a meat counter, an ABC license). I feel like nowadays most grocery stores in Arlington carry many of the cucina latina staples.