I appreciate the feedback. I take certain things for granted since I know how I built it! Now I realize that the only method to drink a beer is really obscure.
... oh while I was typing this I got the notification that you're drinking a beer, so I guess you figured it out. But for others:
Drinking a beer or reviewing it is done near the top of the beer profile page where there's a row of 6 buttons under the word "Participate". The 4th one, which is a beer mug, is the one you click to Drink the beer.
I will have to come up with a better way of making that obvious, because now that I tried explaining it, I can see how it's next to impossible to figure out!