Often on a trip, there will be an odd number of people from my school getting involved. As a result, one person will be left isolated on their own pair of chairs (chairs on coaches are pairs of 2 chairs, one on the left and one on the right) and often I'm left alone on a pair of chairs by myself. Across from me on the pair of chairs next to me are some friends that are happily engaging in conversation, as they are not sat next to me (there is an aisle running down the coach between us) they aren't really including me in the conversation.
I don't want to directly ask or point out that I'm not being included, as they're not deliberately leaving me out. So is there any way to easily engage with them across the aisle to make conversation?