New York Times article reports on research that nonalcoholic beer contributes to recovery of marathon runners.
The author states that only nonalcoholic beer has this effect but from the description, this research didn't test alcoholic beer (because it would have been "impossible" for a marathon runner to drink a liter and a half of beer per day [ha!]. Also interesting that they attribute the effect to polyphenols.
As a low-carber that plays soccer, I'll occasionally get a sorghum beer after a game. Interestingly, I don't get the middle of the night leg cramps when I have a beer post-game. Even added it to my ritual.
So why not beer after exercise?