I have "Free Beer Tomorrow" - which I guess is my 'main' band. It's from the old joke neon signs you may have seen in bars in the past.
My other band that I just started is "Eric's Tile Dysfunction". I started it up to get a fresh slate of challenges, etc, to learn hard bass while I'm recovering post-surgery and can't sit at the drum set.
So the idea was basically that Free Beer Tomorrow would be my hard drums band, and Eric's Tile Dysfunction would be my hard bass band. When I move to expert drums, I'll probably make a new band for that. That's a habit I got from the Solo career in RB1.
I had one band for drums, one for guitar/bass, one for vocals, and one for a 'full' band.