The are on the lido deck, next to the bar. Think where the Dive In is, and go to that location on the other side of the ship. Or if you walk out of the Lido restaurant on the Port side going forward towards the midship pool & the spa/gym, it will be on your left (the self-serve beer dispensers will be on your right).
The Konginsdam has 2, while the other Pinnacle ships have just one. And the NS machine was working great 2 weeks ago (it even ran out of Root Beer, but was restocked later that afternoon).
Mark