Of course, I do have to ask, is there anybody that actually claims their band-as-secondary-income on their taxes? I have yet to meet one. That's why I ask.
Yup, I do. Partly because they send a copy of the 1099's to the IRS as well as to you..

You do get to deduct musical gear, which is an automatic approximate 30% discount on your musical gear. And there's the satisfaction of knowing you won't go to prison.
I got to spend a few nights in county jail with my last job. Had to work with one of the COs who worked midnights inside the lockup. I REALLY enjoyed the part in the morning, where I walked up to the "airlock" leading outside, waved at the camera, and heard the "CLICK" of the door unlocking for me to leave.
I for one would not want to be in a position where as I walk by the camera, wave, and instead of hearing the "click" of the lock unlocking, hear "Move along buddy"...
But that's just me, maybe I'm old fashioned.
I don't want to play too often any more, not too many weekends. So I don't make a lot of money at the end of the year. Not a major source of income, day job takes care of the bills. But its handy extra income, it keeps me from hitting the ATM to get money during the week. After it pays for all my musical equipment.
Randy