Yes it's a little harbour boat tour boat that's had all of the seats ripped out and a bar and soundsystem put in, leaving most of the space for the dance floor.
Catch it from the far west end of Landungsbrucken. EUR8 on, and then beers are EUR2.50. It docks once an hour so people can get on and off, but once you've paid your EUR8 then you can stay on all night.
One point worth noting: go to the toilet before you get on as there's only one toilet aboard and the queue moves pretty slow!
This user has arrived from Qype, a European company acquired by Yelp in 2012. We have integrated the two sites to bring you one great local experience.