Self-made rock powerhouse Frank Bang started his career managing Buddy Guy in his 20s, exposing himself to his "own private blues university." Around 2005, with stints with Clapton and Santana under his belt, the guitarist spawned Frank Bang's Secret Stash, a group that brandishes arena-sized hooks a la the Black Crowes. Tony Mac has a similar story, but his band the Mag 7 kicks a bit more rock ass, the way MC5 used to. Why are the two collaborating on an acoustic happy-hour series? Mainly out of respect for the blues that spawned them. (Gavin Paul)