It would look better with the seats being closer together as described by Krunnie. When so far away, the cinema feels empty. Plus, you’ve added two cup-holders for each seat, and in cinemas, it’s usually the case that each seat has one cup-holder.
The cinema walls and ceiling look extremely bland. A rule of thumb is that plain walls can look fine in real life but when made online, can often look very cheap and undetailed. Therefore, I would recommend adding detail. An idea could be using diagonal bevelled squares as ceiling tiles, outlined with a much more blocky outline. I’d make the walls/ceiling black and purple as well.
Here is a very poor visual aid for what I mean by a ceiling design (would have lights on some panels)
By the way, cinemas tend to have speakers. Not sure if you already included them.