Cha Cha Cha is a type of salsa, just slowed down so you can add more steps than in salsa!
123, cha cha, 567, cha cha is the standard rhythm.
It's my favourite! Sh! Why? Because it's slow enough that you have TIME to play with the rhythm, and because it's exactly that: rhythmical. I don't mean ballroom cha cha, I mean street-style funky cha cha danced to 1970's NYC cha cha music, infused with pachanga and hip hop flava. Oh yeah!
youtube.com/watch?v=DW5P34K96XQ&feature=related
http://www.youtube.com/watch?v=rLBoBp45OJY
Ana and Joel Dominguez (wicked lead he has!)
http://www.youtube.com/watch?v=_BaKaXskVGM&feature=related
http://www.youtube.com/watch?v=XS6wYkD-HXo