I adore the Nizza, with its turn of the century (19/20th) appeal, huge shared bathrooms, and friendly staff. (They offer private baths as well).
The Nizza is very close to the bahnhof and offers a generous breakfast; large, clean rooms; and a sort of Turkish design inspired gemutlichkeit that I adore.
I have booked rooms there with ten friends a summer or two ago and will stay there again next year. You have to appreciate the rakish natuire of the near-Bahnhof neighborhood, but it is convenienmtly located to the Museumsufer and Sachsenhausen. A great value.
If you have any bohemianism in your soul, stay at the Hotel Nizza. You'll love it.
- Nizza Hotel Frankfurt