Midnight Riders

The Midnight Riders are a heavy metal band in the Left 4 Dead universe. They are apparently famous for their pyrotechnic light shows performed during their live performances. Though never encountered directly several posters advertise them. They were scheduled to play at Whispering Oaks but their performance was canceled because of the infection. A jukebox in a cafe has their songs One Bad Man and Midnight Ride. Alternate versions of these are played when Tanks attack: One Bad Tank and Midnight Tank. It is hinted they escaped from the horde, even after refusing to stop their tour after the Green flu came over. Their songs can be found in The Parish's, and Swamp Fever's jukebox.

Trivia

 * The Midnight Riders will probably end up being DLC, as there are four of them and Valve goes into great detail with many aspects of them.
 * Their campaign might end up being the last four places on their tour, getting there via their tour bus. If not it will then probably take place in Rock Hill, SC, the next stop after Whispering Oaks.