How many of you guys use more than one keyboard when performing? Or maybe a keyboard and an electronic drum by the side or a drum machine ( but not in the way that you just use the drum machine to push Play on it and thats it, but actually playing something on it)

For me one Keyboard isn't always enough, even when i force to do that performance just on one arranger keyboard, there's to much hassle in switching between user programs, sounds, styles, keyboard modes...