I probably have like...half a dozen fictional bands across various stories with 4-5 members each, and a handful more characters that just randomly play instruments ahaha. Some of those stories are straight up just about the bands. Most of them play guitar/bass/drums (or just vocals), but I have a couple piano and violin players in the ranks.
I don't have art of all of them on hand but here is my newest literal band of idiots:
They're a self-described "up-and-coming" pop punk act called Stop, Thief! with a bad habit of getting into supernatural shenanigans on the road. I think their story is going to be a comic eventually but who knows when I'll get that off the ground 
Edit: I went back and counted--I have 9 fictional bands, though some of them share members due to existing at different points in the timelines.