Sadly, everything is a bit cleaner, more sanitized, and more corporate now. There's nothing inherently wrong with that -- Detroit's music scene still rivals that of any other major city -- but if you're looking for that down and dirty feel that has largely been displaced, look no further than Flint.
The Machine Shop is a rock, metal, and non-Swiftian country institution, and while it's relatively new as far as legendary music clubs go -- it opened in 2002 -- it is already on par with Harpo's as one of the premiere heavy metal venues in the Midwest (bonus: they've also got a great Michigan beer selection). Flint Local 432 is an all-ages, nonprofit, substance-free music and performing arts venue located downtown, and while you might read "substance-free" as "fun-free," try to remember being a teenager and not being able to see some of your favorite bands, and how you had nothing to do but sit around and smoke cigarettes and get into trouble. And then also remember how you can't even smoke anywhere now and everything is terrible, and be happy for the kids who have the Local 432 to hang out at instead of some lame community center.