Everyone has pre-conceived notions about hostels. Yes, you do sleep on a twin bed, for a total of 8 - 12 people per room on bunk beds. There is usually one bathroom for every 4 people in the suite. Sometimes they are dorm-style rooms where bathrooms are down the hall. The establishments in the US are not on the same level of quality and comfort as the ones in Europe. On my second vacation in London, I stayed at a wonderful hostel. The Meininger Baden Powell is conveniently located in the posh neighborhood of Kensington. There were several bus stops in front of the building and two tube stops within walking distance. Also, the hostel was in walking distance to the Museum of Natural History, Kensington Gardens and Kensington Palace. The rooms were clean and large, with single, double, and shared rooms available. I chose a shared room and paid just $23 per night. Meininger has hostels in Germany, and just opened a place in Vienna, so check them out.