If you have been to any sort of convention or expo, then you have probably had some interaction with a volunteer at any given time. In fact, I would say that without the help of volunteers, then some of the events, especially an event like UK Games Expo would be a lot smaller and less awesome. Volunteering is a great way to attend an event for a low cost, as well as a way to give back to your fandoms. You can use that as an opportunity to get to see a new town, city or even country, if that is part of the opportunity. You’ll have to pay for your own travel to get there (sometimes your own accommodation too) but after that, there is usually very little to spend for.