I recently started making ginger beer with sorghum as the sweetener, and it comes out awesome! I'm truly addicted, and I recently thought about what would be a nice flavoring for the beer.
I though carob would be good, and I looked it up. It seems the ancient Egyptians made carob beer, and I mixed a batch two days ago.
I just sample tasted it this morning, and it's very fizzy and tastes like beer! I'm very impressed so far, but it won't really be ready until two days from now.
This may be a regular thing with me, because I'm very interested in the health benefits of carob, so it goes well with my beer habit, which I engage in for the probiotic properties of home-brewed beer (I only brew it for four days at a time, so the yeast and lactobacillus cultures are still alive and help with digestion).
I hope this helps!