lorinsv60

There's a breakdancing mat available only in the community lot catalog under the Games tab (the fire dance one is there too). Place it on a community lot and it spawns a breakdancer when your Sim visits that lot. Click on the breakdancer and there's an option to learn how to breakdance for $75. After your Sim learns to breakdance, there's an option to breakdance on your Sim's self menu.

Yes, weird, but funny in that "doesn't take itself too seriously" Sims kind of way.