Absolutely not; 36 is not too old for hostels, and the "backpacking" demographic has aged significantly in recent years to include "flashpackers" and digital nomads in their 30s and 40s. While some specific "party hostels" in cities like Prague or Budapest may cater to a younger, 18-24 crowd, the vast majority of hostels welcome guests of all ages. Many modern hostels now offer private rooms with en-suite bathrooms, which provide the social atmosphere of a hostel with the comfort and privacy of a hotel. Most European hostels have no upper age limit, with the rare exception of some state-run youth hostels in Bavaria, Germany, which may prioritize those under 27. Choosing "boutique" or "luxury" hostels is a great way for travelers in their 30s to find a more mature, like-minded crowd.