I actually like the idea of cooking with it. If you can't drink it, that might be an alternative.
I read 2 1/2 pages before I got to my first thought. I'd think the ol chicken with beer in it's butt would be a prime candidate for Garlic Beer. Also for the bath for Brats on the grill.
Then you could make a fine batch of bread to eat with Italian food...just dump the beer right in the bread dough.
When you were done with that, I would soak some deer steak in it over night before lightly flowering and pad frying.
The possibilities of a garlic beer are nearly endless....I'd say that they end at the notion of pouring one in a pint glass and thinking you were going to drink it.