It's very, very difficult to advertise beer on the virtues of quality, seeing as how beer is so cheap to brew that the aluminum can the beer is sold in is worth about eleven times what the beer itself is worth.
Most beer advertising can be summed up in one sentence: "Look! Tits! Give us your money."
Sometimes, this can be done well. This billboard is really not bad:
It's visually interesting, it's creative, it makes effective use of color and space, it's well-composed and nicely balanced, and best of all, it isn't insulting to the viewer. It may not have much to say, but it's a nice board nonetheless.
On the other hand, some billboards advertising beer are NOT so well done...