In general, it is never a good idea to drink alcohol when you take your medications. With some medications, it is recommended that you don't drink alcohol at all. But I do not know if Ampyra is one of those.
You could ask your pharmacist or doctor these questions and they would be able to advise you correctly. Nobody here is a medical professional or qualified to make specific recommendations. So my answer is - I don't know.
When you do get the answer from the pharmacist, please let us know what the answer is. It might help someone else looking for the same information.