This Denver-based salad chain, which was founded in 2004 and operates in four states, just opened its first drive-thru. New units will also feature drive-thrus to better serve moms with kids in the back seat as well as workers on quick lunch breaks. In August, Mad Greens announced plans to open an outpost at Austin-Bergstrom International Airport, in Austin, Texas. The chain features customizable salads with housemade dressings as well as paninis and juices.