Hi Dave,
Well, this is my thoughts.. you must remember our mouths are not the same after Radiation. Not enough saliva to help protect the lining of our mouths and throat.
So having a drink could be an irritate to those tissues. Having a drink with a milk base is a good idea. Or having something to coat the mouth first. I have had sour cream or a milk based drink first. I love my beer but I have to limit it. You are young and want to have a few with the mates but I would be very careful and not over do. Just something to think about.

Take care..Diane