A hostel is a place where people share common areas, a kitchen and even dormitories. And another way of giving people the opportunity to share and get to know new people is by encouraging car sharing.
So if your hostel is located where one must rely on transportation to reach must-see attractions, why not implement a system that allows people to visit them together?
Below we have made an example for a simple yet functional form where your guests could sign up if they have free seats in their cars, and where they are planning to go. This particular one is in Portuguese/English, but feel free to use it as an inspiration to easily make your own car sharing form!