Sorry it has taken me so long to get back here. We had flu and family and all kinds of crazy going on:)
CC is usually in the YEC of things. Maybe some communities are less committed to that, but I haven't come across any that aren't pretty avidly YEC.
That being said, I can give an example of one way I have handled this, fwiw.
This year, my son is studying biology, and we are using the Miller Levine textbook... Which I love:-). We had an opportunity to do a lab group with a friend whose father was a high school bio teacher in his younger years. I was VERY excited because I wasn't especially looking forward to doing labs and because I assumed that he would be more standard science-oriented than AiG science-oriented, lol. This was a poor assumption on my part, which I found out when they sent out the welcome email that included his testimony and views on origins.
So, I got in touch with my friend. I told her that we aren't YEC and that we were using a different text for the year. I asked her how much YEC "material" he was planning on using. She didn't think he would be doing much of that because it was a bi-monthly lab, not a full class. I assured her that, since I knew that most (really all) of the other families are YEC, my guy wouldn't be proselytizing to the contrary, lol. However, I made it clear that I didn't expect anyone to try and convert him either.
I would not have joined the group had it been an actual class. Since it was lab only, I figured there couldn't be too much YEC love going on... There is only so much one can cover in 2 hours, twice a month.
It has worked out ok. I don't necessarily regret it, but I don't know that I would do it again either. We hit a wall around the evolution module (they were using apologia). I had let them know at the beginning of the year that we would be skipping that class. But, I did get a note from the instructor anyway trying to change my mind because "it is so important that our young people understand this." It was a long note in the Ken Ham vein. I knew where he was going because my son had mentioned that he had called Ken "a hero of our age" during class. I did check and my son held his tongue and did not laugh. I was proud of him;-)
I did write back explaining where we stood and thanking him for the generosity of spirit he showed in his willingness to teach young people. He tried one more time and I left it at that.
It is important that my kids are respectful of the relationships they have with other people even if they disagree, so we had lots of talks on how to handle things if someone comes at him with YEC arguments. Especially how to deflect because, even though he is bright, he is not at an age where he can fully flesh out arguments for EC. We will continue working out how to present EC respectfully but firmly if necessary.
If you share your position with the instructor and they agree to "do no harm" lol, and you are comfortable quietly supporting your view and can supplement content-wise, then you can take advantage of whatever classes might be a fit. If you think you may have to spend all of your time undoing what they do, you may want to exempt yourself from the science piece of CC. I doubt they would turn you away unless they felt threatened by your position... They are always looking to keep their numbers up.
Good luck. I am going to go read the other responses now, so I apologize if this is redundant to someone else's post;-)