Just a basic refrigerator I have in my mancave part of the basement. I deliberately looked for a regular frig that would comfortably hold four ⅙ barrel kegs. Then just drilled holes for four taps on one side, and two holes on the other side for a CO2 line and a "Guinness gas" mix on the other side. A manifold takes the CO2 and splits it into three llnes. Each line has its own keg coupler attached, and of course the Guinness line has that special coupler. I also have keg couplers for most of the other specialized kegs that exist, and it's a simple matter to switch one into the rotation if needed.
The only real workaround needed is that if I want to have a real ale in a firkin, I need to put it on a separate bar, covered with an ice blanket and using a cask breather, with an Angram ¼ pint beer engine attached. But that's probably incomprehensible to the average American beer drinker so I won't belabor the point.
Mine is functional and certainly enough for me, but yours is just flat beautiful!