The avoidance of dancing is mostly because of the impact it involves, which is partly true. I'm never a fan of saying "never", because there are always exceptions and if you manage yourself wisely, you can still dance or do some impact, but it's the principle that is important, and that's correct - you have to be careful about impact.
As for Zumba, I'm not 100% familiar with it, having never done it. So I speak without experience, but I do think you would have to be careful about it as well. For example, you currently have back pain after class, but not the day after, which suggests you may be right on the limit of what your body can handle. If you did any more high impact training, you might find that your back is sore the day after as well.
So you just have to be cautious. If the pain lasts, then it's too much. At the moment, I think you're OK, but just monitor it and be careful, and you'll be OK. With time and training, you may even find that the back pain disappears and you can train a little harder.
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.