From time to time, car dealerships will hold events. Often these events are put on to showcase a new model of car that is coming out or to promote a special offer that they have on. These dealership events can be a great time to pick up a bargain and are often quite fun. It may be that you have the opportunity to look around the vehicle and take it for a test drive without the pressure that you may feel should you go in to the dealership and speak to a sales person on a one to one basis.
Although the sales people will obviously be trying to make a sale, they may just want to use the time to show you around the range of vehicles they have on offer and then make an appointment for a convenient time to speak to you in greater detail about what vehicle you are looking for.
If you are looking to buy a vehicle, then doing on a deal at an event could allow you to save a huge amount of money and often get a few freebies thrown in too.