CBGB. It's about . . . well, it sure as hell ain't about Country, Blue Grass, and Blues.
I was even in that place once, back about '77 or so. It was a &uckin' $#!+hole, and this flick does a good job of showing that aspect. I must confess I was never much a fan of punk, though I did like a lot of stuff from the likes of Talking Heads and The Police, and Blondie and Patti Smith did some good songs too. But mainly I felt, in the immortal words of Joey Ramone, "I can't believe we got a record contract. We suck!"
The movie is decent. It is worth 90 minutes of your life, if the topic interests you.