I like to partake in beer drinking when I golf with company. Most of the time I play solo or with my young son in tow, so no drinking then.
I do tend to play better after about 5 or 6. If I go farther then that things like chipping and putting go down hill. Ball striking stays about the same until I get to the 8+ range. Then I don't care if I hit a bad shot or miss a putt!!!
I don't let the weather dictate when I drink, hot days, no big deal. I can rehydrate at home!