Two in One Hand with a Figure of Eight
Here one hand juggles two, and the other weaves the third club through the pattern in a figure of eight. I find double spins in columns the easiest pattern to use. Try this with balls first to learn the timing - it isn't much more difficult with clubs.
The swinging movement may feel jerky at first, but a figure of eight is the most natural and best looking path, and with a bit of practice you'll get it.