Hi 2br02b! Welcome to the forums.

I don't know much about this topic, but you might want to check the thread
French Jive and Le Roc. There's a bit of information there. From what I've been able to decipher, LeRoc or Ceroc (depending on which club you go to) has evolved along totally different lines than the balroom jive as done in dance competitions.
And, from what I can tell, it's difficult to find instruction in LeRoc outside of Europe. Not sure where you are, but if you're not in Europe, chances are the jive classes you're being offered are ballroom jive.