You should follow your instincts and stay away from zones that aren't to your taste. Remember that what some people find quaint, others find sleazy. Hot showers are not always included in the price of the room. In summer this probably won't be as important, but at other times of the year you should take this cost into account in the price of the room. The prices shown are for the most basic room, and usually don't include a bathroom or toilet unless specifically mentioned.
Some places offer rooms with or without a bath.
Also, make sure to check the lists of hostels and hotels for some alternatives for accommodation during your stay. The youngest daughter speaks german. Rooms are avaiable with and without bath, and are very clean. Includes use of a kitchen and washing machine. Discounts for stays longer than 1 week.