I find port works best with painting .. easy to drink and gives a nice chilled buzz. Beer is terrible you want to go to the toilet as infrequently as possible when painting.
I find popping open a bottle of wine allows me to relax. Then, instead of feeling like I need to be focused and 100% mentally there, I just chill and do art.
coro's weapon design one is dope and his commentary is halarious. really laid back and chill but some cool tips as well. whits ones on env sketching are cool too.