@BoobleMcB
This happens to me sometimes. In the cinema, or on public transport.
I'm no gonna lie. I move.
I sit on my own because I want my own space, and quiet, and to be uninterrupted by coughing, sniffing, and smelly people. If someone sits by me (when 50-60+ more seats are available,) I will move.
I may sound like a rude, ignorant cunt, but I don't want to talk to someone I don't know, or care about. 4 times out of 5, when some weird stranger approaches you to sit by you, (and talk to you,) all they talk about is themselves. Fucks me right off!
As I said, I will move. And I DO move. I don't give a fuck if the person is offended. Why should I?