Open Soloist Dialog (Soloist Button) Choose realtrack top left, in the middle right "Solo Which Choruses ?" First > Yes-solo Middle > No-solo Last > No-solo, there are more settings if you wanna play around, and you can click on Bar 1 hit F5 set solo to mute, go to chorus start bar hit F5 set solo to Back to Normal.
That worked when I tried it so good luck. You can have a play with RealBand, you can visually see where things in that, but depending on what you are doing ?