I always think of a beer fridge as being the old fridge that was still running when you upgraded, so it got moved to the garage and used for beer. Whereas a bar fridge is a tiny little fridge you buy with the intention of storing beer in, then discover the shelves are all the wrong heights to store most drink bottles and you can't fit enough in to manage even a small party, so you end up using the sink full of ice anyway. Although it was surprisingly acceptable as the only refrigeration I had when I first moved out of home.