Is Alcohol Good for Fitness?

Oh, I'd been so good. Didn't touch a drop. Then I traveled last week and fell off the wagon. Leaped off. Dove head first. Martinis, Cabernet...and I loved it. Now my hips are on fire and my high-intensity training seems more intense.  

So I asked the official Time Barrier Researcher, Lee Michaelides, to tell me:  Is booze good or bad? Is some booze better than others? How long before you body gets rid of alcohol? And should you work out with a hangover?