We use clubbells quite a bit in our WODs, along with med balls rotational stuff. Mostly two handed exercises, as in a class format it works better logistically. (we need more clubs) I use a number of different drills, but I use swipes, side swings, clockwork squats, and hammer swings quite a bit.
I will sometimes use them in complexes with light med ball throws for power generation. Heavy, low reps with the clubbells, followed by med ball throws for max speed and power using a similar movement pattern.