I haven't been to parties abroad, but from what I've seen in my country, whenever there is cha-cha playing at a salsa party, everyone is just dancing crossbody salsa in the cha-cha beat. Is this wide spread or just some local phenomenon? At the last party I saw a couple that I have never seen before. And when the DJ played a cha-cha it was obvious that they had danced ballroom before. It was very different from all the other couples that were on the dancefloor, and not a minute into the song they had more than half the floor for themselves. She was with somekind of backless top and by the end of the song it was all tangled up, but she didn't seem to care. Anyway, they looked waaaay better than all the other couples.