If you are interested in the local nightlife scene while traveling, then you should definitely check out organized pub crawls. Most hostels organize these kinds of events because they attract so many people, so going to a nearby hostel is a good way to find a group of like-minded travelers wanting to enjoy the night. So get ready to meet new friends and get more for your money by joining a local crawl.
Or you could forget about the pub crawl and just find yourself a single spot to immerse yourself in and take in the city's vibe. That, too, is a great way to experience the local nightlife.