One of the oldest Frankfurt bordellos outside of red-light districts. 'Das Sudfass' cosists of two brothels. One is a Laufhaus similar to houses in Breite Gasse and Bahnhofsviertel RLD, the other one is a sauna club similar to FKK whorehouses. Since it's an older style house it's not as guest friendly as newer establishments. There have been various negative reports about this house on international sex guides and local sex boards.