Whether a 17-year-old can stay at a hostel depends entirely on the specific hostel's individual policy and the legal regulations of the country in which it is located. In many parts of Europe and North America, 17-year-olds are still legally considered minors, and many "youth hostels" or "party hostels" have a strict 18+ age requirement to prevent legal liability issues related to alcohol or unsupervised minors. However, some hostel chains (like YHA in the UK or Hostelling International) do allow 16 and 17-year-olds to stay, provided they have a signed parental consent form and, in many cases, a private room rather than a shared dormitory. It is extremely rare for a hostel to allow a minor to stay in a mixed-gender dorm with adult strangers for safety and insurance reasons. If the 17-year-old is traveling with a legal guardian over the age of 18 or 21, the rules are often relaxed, and they can stay in the same room. Before booking, it is essential to contact the hostel directly or check their "House Rules" on booking platforms, as a minor arriving without the proper documentation or a pre-approved policy will likely be denied entry at the reception desk.