My sister sent this to me and I thought I'd share it with you guys- its a great deal. The tickets end up being $3.75 apiece.
On tippr (a group buying site) under Atlanta, there are 4 movie tickets for $20, but you get a $5 credit when you sign up, so it ends up being $15. I think the sites to use it on are fandango and movietickets.com.
Here is my referral link if anyone is interested:
clicky