their atacks are dancing, what kind of dancing... they dont specify.
my favorite dance is the curb stomp. what about the tango, you need a partner for it and the casting wizard makes a logical choice. a little moshing amongst the bad guys is dancing... break dancing should make you harder to hit maybe a dodge bonus?
Feel free to house rule away the effects of Otto's Irresistable Dance if you want to. The spell as written is pretty darned powerful. However, without a house rule, the effects of OID are: no actions, reflex saves only on a 20, and maybe some other stuff I can't recall right now.