Will the Purge still be playing on July 27? How do you know what will be playing in advance?

Check there website

I asked them that last time I was there. They told me to check their Facebook page weekly for weekend updates. They only know what's playing one weekend at a time.

I always check website a few days before i go. Im not sure about the upcoming

They have a Facebook page

Look on the website i think it will tell you upcoming

https://badinrddrivein.wordpress.com/