While Reeperbahn, Große Freiheit and Hans-Albers-Square are worth a glimpse, the clubs at Hamburger Berg are a less touristy way of spending the night on the dancefloor.
The layout of the building is an homage to the penis itself: A long narrow bar leads into two tight networks of small rooms with wipe-clean beds and showers and lighting that you'd never want to read a book under.