Foo Fighters frontman Dave Grohl has spoken on the band’s commercial appeal, saying that he’s not sure they’ve ever felt cool.Speaking in a new interview, Grohl talked the criticism he and the band received early on and the perception that he shouldn’t have carried on making music following the disbandment of Nirvana.“I don’t know if we’ve ever felt cool,” Grohl told Rolling Stone, discussing the idea that once a band reaches a certain level of fame they lose cool points.He went on to say that