For summer travel, in parts of Europe and the USA, many universities rent dormitory rooms to tourists. The bathroom is usually shared and they're not fancy, but they're clean and in some places air conditioned. Cafeteria meals are often available on premised too, cheap, and some places have shared kitchen facilities. Sheets and towels are provided but don't expect hotel type toiletries or other amenities, and you might not have housekeeping service every day.