Philadelphia psych-rock band War on Drugs is the latest indie band to pay tribute to the Grateful Dead. While performing at Washington, DC’s Rock and Roll Hotel on Sunday night, the group bused into a cover of the In the Dark single “Touch of Grey.” In true jamband fashion, the song was already up on the site PHILEBRITY.COM the next day. War on Drugs may revisit the cover again at Indianapolis, IN’s Radio Radio this evening.