I know this is not showing at many theaters so it may be a thing where your mileage may vary, but it is worth a shot for free tickets. And, more to the point, Republican friends and co-workers may be willing to see this movie if it is free. I saw this the other night and it really is important that as many people see it as possible.
Go to:
http://action.nwf.org/campaign/tgwtickets and scroll down to where you see the free ticket request. They will send you a code to use at Fandango so you can get two free tickets.
I believe the code is the same one for everyone, so if you do not want to sign up for this, you could try : AnInconvenientTruth2
Let's all work together to get word out about this great movie. The more people who see it, the better.