Here's the next installment in
A quick note: This isn't mentioned until a future chapter, but it's not really a spoiler: It's stated that playing rock music is a grave offense in Metropolis, which is why all those people died in chapter 1. But as you may have noticed, the guys' instruments are different (note how Russ refers to his Bass as a "rythmer"); They resemble guitars/etc in shape, but are actually synthesizers like the Roland G-77. However, they can produce literally any kind of sound, even human singing. So since they're not actual rock instruments, they aren't busted for doing shows.
Hopefully that should clear up any questions you might be asking.
Fool for the City Ch.3 (FftC) [Mamoru Nagano] *NON-H*