I do have longish hair and drink Guinness occasionally. I don't have a beard (at the moment) and I NEVER close my eyes when singing and I'm not going bald.

Now and then I will speak a line or two in a song for emphasis. I rarely sing long songs.

So Shagger, dress how you like, shave or not as you wish and if you're going bald get yourself a wig. It doesn't matter as long as you SING.