Great Idea #4964: Available Movie Seats (AMS)

This one came to me in the shower.

You know how when/if you get to a movie a bit late, maybe the trailers have started, and it's dark. Well if the theater is almost full, it can be a big ordeal to find a few seats located next to each other in a spot you would like to watch the movie. So here is my big idea: You ever notice those red lights on the runners of the theater to help you see where your going... well, what if on the right hand of each movie theater seat they placed a similar red button on the armrest. The rest button is lit when the seat is folded up (by default), and when the seat goes down (obviously occupied by a person) the light turns off. So when the seat is lit, you can easily look around the theater and see which seats are taken and how many there are.

Additional/Separate Device (Thanks to the creative mind of Dan): what if at the entrance of the movie theater there was a board which showed a layout of the seats and seats that were lit up were available, so therefore you can just walk to that seat.

All this is meant to clear up commotion that happens when people are walking through the theater obstructing your view of the trailers/movie in the dark.

So... Should I patent the idea?