I preferred no alcohol at all (especially beer/pint-type alcohol) when I was gigging, but that was mainly because I was the lead singer.
I found that almost any beer impaired my hearing, or at least my ability to "focus" my hearing, and it seriously affected my stamina and the amount of breath I had at my command... Also, I wasn't such an effective front-man entertainer when I was feeling "woolly-headed".
I had to take liquid on board though - during the course of two one-hour sets I would usually drink about 4 pints of water. Virtually all of this must have been sweated out (I never needed a pee after gigs!)
The only exception to this was if I had throat problems. An old folk singer let me in on the "half a guiness with a port in it" secret to get/keep your voice going when you can hardly sing a note... This really does work :lol:
However, you can overdose on it and end up with the aformentioned "beer" problems... so I found out that for me "Port & Brandy" has the same effect on the throat, but didn't get me so p1ssed.
On a "bad-throat" night I would have the pints of water on stage, with a glass of Port & Brandy (4 measures of each) beside them for sipping all the way through the night. If there was much left, I'd down it in one as we started the encore... Obviously, someone else had to drive on "bad throat" nights :lol: (I felt sober as a judge, but I suspect a breath-test might have said otherwise...)