I could be wrong but Hamsah is a historically highly religious town. The fact that there are no bars in it (to my knowledge) and no alcohol that I know of (maybe in the bards guild, I don't know) could indeed be a result of that. The main piece of their town is the Temple and they close their gates due to required praying...I think this could be why they don't sell much alcohol.

DC spaketh, "By design."