Not sure what you want for a shower but my Attalia does have something of a mini shower, not that I ever used it! I have a 1986 model and the head wood floor has several holes in it, underneath there is an intake connected to my bilge manual pump. If I used the sink flexible hose, I can "shower" and manually pump out the water.
On the fridge department, my Attalia came with one that the previous owner installed. The unit was mounted in the lazarette and was busted. I bought another one and installed the new one under the sink, just beside the fridge. I have not tried it out yet since this was done just before winter haulout.
Please note that there is NO insulation in my Ice Box.