Alan is shocked and appalled!
That dancing sucked! He'd clearly have to show Rover how it was done.
Summon a stereo loaded up with this song - or something similar, so long as it's extremely retro - and crank it up to full blast. Then walk up to Rover and hand his ass to him on a platter.
By dancing extremely well at him. Or knowing Alan, extremely badly. Either way.
If my stereo/whatever thingy (even a gramophone would work) summoning fails, just do the danceoff without music. Sing instead.((If anyone wants to do some drastic actions, I have a feeling this is gonna take up his attention.))