Not familiar with Henny Dick but I've met his brother Whiskey on a couple of occasions.
For me, a couple of drinks is no problem. Or a few more if they're spread out, as when on vacation. But getting really lit is something I do rarely, and it usually goes with laughter and comradery, not with swinging. It's definitely not a performance enhancer for me.
It's actually a bigger problem for my GF. A long afternoon and evening of drinking followed by sex, can often lead to migraines for her. Probably has something to do with de-hydration which, I suspect might be a factor in Whiskey Dick.
While lack of performance with a sexy lady is extremely rare for me, especially given that I routinely use "backup" when at lifestyle events, it is all too common with other men we end up playing with, which is a huge disappointment for my sweetie. If in doubt, don't overdo it because that outcome is as lame as it gets IMO.