Today, not for the first time, at the cinema I watched people having to ask others to move because there was someone sitting in the seats they'd booked. There's a clear policy at every cinema round here that the seats you sit in are chosen at booking in - either online or on the screens at the tills - and are printed on the tickets. And yet some people seem to just then sit where they like and hope no-one comes and asks them to move.
On one visit, I watched one woman have to move three separate times as she didn't fancy sitting in the seats she booked (she declared this to her children when she went into the screen, I've not just assumed this) and just chose somewhere else to sit.
At one screen it caused a big fuss because one family had decided not to make a fuss and didn't ask someone to move out of their booked seats. Until the people who had booked the seats they'd chosen instead moved up. Then there was a chain reaction of people being asked to move, then going to the seats they should have been sitting in and asking those people to move instead.
Unecessary fuss IMO. Especially when some people arrive to time it when the film starts and to miss the ads and therefore the rearranging happens when the film has already begun.